[ { "part": "ATA 70 – Standard Practices", "ch": "What safety precaution must be taken before performing an engine boroscope inspection?", "ansGr": [ { "ans": [ "Disconnect the aircraft battery only ", "false" ] }, { "ans": [ "Pull the engine fire handle and disconnect EEC connectors ", "true" ] }, { "ans": [ "Drain the engine oil ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 70-00 – B787 RR Trent 1000 Training Material\nExplanation: Isolating the EEC and pulling the fire handle ensures the engine cannot receive power or fuel during inspection, eliminating ignition risk." }, { "ch": "What is the proper method for cleaning electrical engine connectors?", "ansGr": [ { "ans": [ "Use abrasive pads and water ", "false" ] }, { "ans": [ "Use approved solvent and lint-free cloth ", "true" ] }, { "ans": [ "High-pressure air and fuel ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 70-00 – B787 RR Trent 1000 Training Material\nExplanation: Cleaning sensitive engine connectors requires approved cleaning agents and methods to avoid contamination or damage to the contact surfaces." }, { "ch": "What must be done when replacing engine electrical connectors in the pylon area?", "ansGr": [ { "ans": [ "Use high-pressure air to clean them ", "false" ] }, { "ans": [ "Replace with standard AMP connectors ", "false" ] }, { "ans": [ "Match connector part number and ensure environmental seal ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 70-00 – B787 RR Trent 1000 Training Material\nExplanation: Environmental sealing and correct part matching are crucial for maintaining system integrity and avoiding electrical faults." }, { "ch": "What is the purpose of using torque seal on engine fasteners?", "ansGr": [ { "ans": [ "Prevent vibration ", "false" ] }, { "ans": [ "Visually indicate loosening ", "true" ] }, { "ans": [ "Increase torque resistance ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 70-00 – B787 RR Trent 1000 Training Material\nExplanation: Torque seal is applied to indicate if a fastener has moved, helping identify loosening due to vibration or thermal expansion." }, { "ch": "What reference should be used for material compatibility during engine repairs?", "ansGr": [ { "ans": [ "APU maintenance manual ", "false" ] }, { "ans": [ "SRM only ", "false" ] }, { "ans": [ "Aircraft standard practices manual and AMM ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 70-00 – B787 RR Trent 1000 Training Material\nExplanation: To avoid corrosion or improper bonding, always refer to the AMM and Standard Practices Manual for approved materials and procedures." }, { "part": "ATA 71 – Powerplant", "ch": "What must be done before removing the fan cowl on the Trent 1000 engine?", "ansGr": [ { "ans": [ "Disconnect IDG electrical connector ", "false" ] }, { "ans": [ "Pull fire switch and secure the cowl doors ", "false" ] }, { "ans": [ "Shut down the engine and install mechanical locks ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 71-10 – B787 RR Trent 1000 Training Material\nExplanation: Fan cowls are heavy and can close under gravity or wind. Proper support and engine shutdown are essential to prevent injury." }, { "ch": "What precaution is required before removing engine mounting bolts?", "ansGr": [ { "ans": [ "Disconnect EICAS power ", "false" ] }, { "ans": [ "Support the engine with a hoist or cradle ", "true" ] }, { "ans": [ "Deflate the nose gear strut ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 71-20 – B787 RR Trent 1000 Training Material\nExplanation: Supporting the engine before removing mounting bolts is critical to avoid structural stress or uncontrolled engine movement." }, { "ch": "What is a critical alignment requirement during Trent 1000 engine installation?", "ansGr": [ { "ans": [ "Connecting oil filler line first ", "false" ] }, { "ans": [ "Fan blade shroud contact ", "false" ] }, { "ans": [ "Engine-to-pylon interface pin engagement ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 71-20 – B787 RR Trent 1000 Training Material\nExplanation: Proper pin engagement ensures the engine is correctly aligned and secured to the pylon for safe operation." }, { "ch": "When the thrust reverser cowl is opened, what must be verified before performing maintenance?", "ansGr": [ { "ans": [ "That fire loop A is deactivated ", "false" ] }, { "ans": [ "That T/R actuator locks are installed ", "true" ] }, { "ans": [ "That EEC power is on ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 71-21 – B787 RR Trent 1000 Training Material\nExplanation: Actuator locks prevent uncommanded T/R movement during maintenance, avoiding injury or damage." }, { "ch": "What system confirms engine mounting bolt torque values after installation?", "ansGr": [ { "ans": [ "Central Maintenance Computer (CMC) ", "false" ] }, { "ans": [ "Manual verification with calibrated torque wrench ", "true" ] }, { "ans": [ "FADEC ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 71-20 – B787 RR Trent 1000 Training Material\nExplanation: Torque values are verified manually using calibrated tools and compared against AMM specifications. No automatic system tracks these values." }, { "part": "ATA 72 – Engine", "ch": "What is the function of the Variable Stator Vane (VSV) system in the Trent 1000 engine?", "ansGr": [ { "ans": [ "To increase oil flow to bearings ", "false" ] }, { "ans": [ "To control airflow into the HP compressor ", "true" ] }, { "ans": [ "To maintain N1 speed ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 72-31 – B787 RR Trent 1000 Training Material\nExplanation: VSVs regulate airflow angle into the HP compressor for optimal performance and stall margin during varying engine speeds." }, { "ch": "What drives the HP compressor in the Trent 1000 engine?", "ansGr": [ { "ans": [ "N1 fan ", "false" ] }, { "ans": [ "Intermediate turbine ", "false" ] }, { "ans": [ "HP turbine ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 72-31 – B787 RR Trent 1000 Training Material\nExplanation: The HP turbine is mechanically connected to the HP compressor, forming the HP spool (N2)." }, { "ch": "Which part of the engine houses the combustor module?", "ansGr": [ { "ans": [ "Fan case ", "false" ] }, { "ans": [ "Core module ", "true" ] }, { "ans": [ "Turbine rear frame ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 72-40 – B787 RR Trent 1000 Training Material\nExplanation: The combustor is part of the engine core and is located between the HP compressor and HP turbine." }, { "ch": "What precaution must be taken before removing an engine core module?", "ansGr": [ { "ans": [ "Drain the hydraulic reservoir ", "false" ] }, { "ans": [ "Secure the engine mount bolts ", "false" ] }, { "ans": [ "Align and lock rotors to prevent internal damage ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 72-00 – B787 RR Trent 1000 Training Material\nExplanation: Improper handling of rotor alignment can result in interference, damage to blades, or imbalance." }, { "ch": "What tool is used to verify blade tip clearance in the fan module?", "ansGr": [ { "ans": [ "Feeler gauge ", "false" ] }, { "ans": [ "Laser gap tool ", "true" ] }, { "ans": [ "Dial indicator ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 72-21 – B787 RR Trent 1000 Training Material\nExplanation: Blade tip clearance is precisely measured using a laser tool to ensure fan blade operation within tolerance." }, { "ch": "What engine component provides mounting support for the fan case and gearbox?", "ansGr": [ { "ans": [ "Fan stator frame ", "true" ] }, { "ans": [ "Engine rear mount ", "false" ] }, { "ans": [ "Low pressure turbine shaft ", "false" ] } ], "ref": "Ref (CAT B1) Answer: A - Ref: ATA 72-00 – B787 RR Trent 1000 Training Material\nExplanation: The fan stator frame supports the fan module and accessory gearboxes, forming a structural core section." }, { "ch": "How is the Low Pressure Turbine (LPT) cooled?", "ansGr": [ { "ans": [ "By bypass air through radial slots ", "false" ] }, { "ans": [ "With fuel/oil cooling system ", "false" ] }, { "ans": [ "Through compressor bleed air ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 72-52 – B787 RR Trent 1000 Training Material\nExplanation: Compressor bleed air is routed internally to cool the LPT to prevent overheating and material degradation." }, { "ch": "What is used to prevent oil leakage along rotating engine shafts?", "ansGr": [ { "ans": [ "Fuel seal ", "false" ] }, { "ans": [ "Labyrinth seal with pressurized air ", "true" ] }, { "ans": [ "RTV sealant ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 72-00 – B787 RR Trent 1000 Training Material\nExplanation: Labyrinth seals combined with pressurized air form a non-contact barrier to keep oil within bearing compartments." }, { "ch": "What condition requires an in-depth engine vibration inspection?", "ansGr": [ { "ans": [ "Engine stall during start ", "false" ] }, { "ans": [ "Increase in oil pressure ", "false" ] }, { "ans": [ "High N1 vibration on EICAS ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 72-00 – B787 RR Trent 1000 Training Material\nExplanation: High N1 vibration readings may indicate fan imbalance, damaged blades, or bearing faults requiring further investigation." }, { "ch": "During fan blade replacement, what is critical for balance?", "ansGr": [ { "ans": [ "Replace only with fan tip cap ", "false" ] }, { "ans": [ "Match the blade's moment weight ", "true" ] }, { "ans": [ "Clean the blade root thoroughly ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 72-21 – B787 RR Trent 1000 Training Material\nExplanation: Fan blade sets are weight-matched to maintain balance. Replacing one requires using a blade with the same moment weight." }, { "part": "ATA 73 – Engine Fuel and Control", "ch": "What component regulates the fuel flow to the engine?", "ansGr": [ { "ans": [ "Fuel spar valve ", "false" ] }, { "ans": [ "Fuel metering unit in the FMU ", "true" ] }, { "ans": [ "Fuel filter bypass valve ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 73-20 – B787 RR Trent 1000 Training Material\nExplanation: The Fuel Metering Unit is part of the FMU and precisely meters fuel flow to the injectors under EEC control." }, { "ch": "What is the purpose of the LP fuel pump?", "ansGr": [ { "ans": [ "Send fuel to the APU ", "false" ] }, { "ans": [ "Supply suction for hydraulic reservoir ", "false" ] }, { "ans": [ "Boost pressure to HP fuel pump ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 73-10 – B787 RR Trent 1000 Training Material\nExplanation: The LP pump increases pressure to feed the HP pump, ensuring uninterrupted fuel flow during engine operation." }, { "ch": "What happens if the HP fuel pump bypass valve opens?", "ansGr": [ { "ans": [ "Fuel bypasses to the LP pump ", "true" ] }, { "ans": [ "Fuel stops flowing ", "false" ] }, { "ans": [ "Fuel is vented overboard ", "false" ] } ], "ref": "Ref (CAT B1) Answer: A - Ref: ATA 73-20 – B787 RR Trent 1000 Training Material\nExplanation: The HP bypass valve prevents overpressure by routing excess fuel back to the LP side of the system." }, { "ch": "How is the fuel spar valve actuated?", "ansGr": [ { "ans": [ "Electrically by EEC ", "true" ] }, { "ans": [ "Pneumatically ", "false" ] }, { "ans": [ "Manually via override lever ", "false" ] } ], "ref": "Ref (CAT B1) Answer: A - Ref: ATA 73-21 – B787 RR Trent 1000 Training Material\nExplanation: The EEC controls the fuel spar valve electrically, allowing remote shutoff of fuel supply during fire or shutdown conditions." }, { "ch": "Where is the fuel filter located in the Trent 1000 engine?", "ansGr": [ { "ans": [ "In the wing tank ", "false" ] }, { "ans": [ "After the LP pump ", "false" ] }, { "ans": [ "Between HP pump and FMU ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 73-10 – B787 RR Trent 1000 Training Material\nExplanation: The fuel filter is installed upstream of the FMU to catch contaminants before they reach precision metering components." }, { "ch": "What EICAS message appears for a fuel filter bypass condition?", "ansGr": [ { "ans": [ "ENG FUEL LOW ", "false" ] }, { "ans": [ "ENG FUEL LEAK ", "false" ] }, { "ans": [ "ENG FUEL FILT BYPASS ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 73-10 – B787 RR Trent 1000 Training Material\nExplanation: If the fuel filter bypasses due to clogging, the EEC triggers an advisory or warning via AIMS/EICAS." }, { "ch": "What sensor monitors fuel temperature at the engine?", "ansGr": [ { "ans": [ "EEC OAT sensor ", "false" ] }, { "ans": [ "Engine fuel temp sensor in FMU ", "true" ] }, { "ans": [ "TAT probe ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 73-10 – B787 RR Trent 1000 Training Material\nExplanation: The engine-mounted fuel temperature sensor provides input to the EEC for fuel scheduling and performance monitoring." }, { "ch": "Why is pressurization of the fuel system important in flight?", "ansGr": [ { "ans": [ "To reduce EGT ", "false" ] }, { "ans": [ "To prevent cavitation and vapor lock ", "true" ] }, { "ans": [ "To provide fuel to hydraulics ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 73-10 – B787 RR Trent 1000 Training Material\nExplanation: Maintaining fuel pressure prevents vapor bubbles from forming in pumps and injectors, ensuring smooth combustion." }, { "ch": "What is the function of the FMU drain valve?", "ansGr": [ { "ans": [ "To offload excess fuel to the APU ", "false" ] }, { "ans": [ "To manually test for fuel presence ", "false" ] }, { "ans": [ "To drain fuel during maintenance or shutdown ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 73-20 – B787 RR Trent 1000 Training Material\nExplanation: The FMU has a drain feature to release fuel trapped during shutdown or when servicing the system." }, { "ch": "How does the EEC control fuel flow during start-up?", "ansGr": [ { "ans": [ "By adjusting HP pump speed ", "false" ] }, { "ans": [ "By modulating FMU metering valve ", "true" ] }, { "ans": [ "By increasing N1 ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 73-20 – B787 RR Trent 1000 Training Material\nExplanation: The EEC commands the FMU metering valve to deliver the required amount of fuel based on N2 speed and start conditions." }, { "part": "ATA 74 – Ignition", "ch": "What controls the ignition system during engine start?", "ansGr": [ { "ans": [ "FADEC backup ", "false" ] }, { "ans": [ "APU controller ", "false" ] }, { "ans": [ "EEC ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 74-11 – B787 RR Trent 1000 Training Material\nExplanation: The Electronic Engine Control (EEC) automatically controls ignition timing, duration, and selection during start sequences." }, { "ch": "How many igniters are used in the Trent 1000 engine?", "ansGr": [ { "ans": [ "One per combustor section ", "false" ] }, { "ans": [ "Two per engine ", "true" ] }, { "ans": [ "One shared between engines ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 74-11 – B787 RR Trent 1000 Training Material\nExplanation: Each engine is equipped with two igniters (A and B), one in each ignitor plug hole of the combustion chamber." }, { "ch": "What happens if one igniter fails during engine start?", "ansGr": [ { "ans": [ "The EEC aborts the start ", "false" ] }, { "ans": [ "The remaining igniter continues operation ", "true" ] }, { "ans": [ "APU ignition system is used ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 74-11 – B787 RR Trent 1000 Training Material\nExplanation: The system is designed to operate with a single igniter in the event of a failure to complete the start." }, { "ch": "Where is the ignition exciter located?", "ansGr": [ { "ans": [ "Inside the EEC ", "false" ] }, { "ans": [ "Mounted on the fan stator frame ", "true" ] }, { "ans": [ "Integrated with the fuel metering unit ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 74-11 – B787 RR Trent 1000 Training Material\nExplanation: The exciter boxes are mounted on the fan stator frame and supply high voltage to the igniter plugs." }, { "ch": "What mode does the ignition system use during in-flight relight?", "ansGr": [ { "ans": [ "Continuous ignition ", "true" ] }, { "ans": [ "Ground-start mode ", "false" ] }, { "ans": [ "Auto-spark suppression ", "false" ] } ], "ref": "Ref (CAT B1) Answer: A - Ref: ATA 74-11 – B787 RR Trent 1000 Training Material\nExplanation: During in-flight relight or flameout recovery, the system enables continuous ignition to support combustion re-establishment." }, { "ch": "How is the igniter plug connected to the exciter?", "ansGr": [ { "ans": [ "Coaxial ignition lead ", "true" ] }, { "ans": [ "Copper tube ", "false" ] }, { "ans": [ "Fiber-optic cable ", "false" ] } ], "ref": "Ref (CAT B1) Answer: A - Ref: ATA 74-11 – B787 RR Trent 1000 Training Material\nExplanation: The igniter plug receives high-voltage pulses via a shielded coaxial cable from the exciter." }, { "ch": "What controls the duration of ignition in automatic mode?", "ansGr": [ { "ans": [ "Ignition switch on pedestal ", "false" ] }, { "ans": [ "EICAS message logic ", "false" ] }, { "ans": [ "EEC based on N2 and EGT ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 74-11 – B787 RR Trent 1000 Training Material\nExplanation: The EEC determines when to terminate ignition based on successful light-off and rise in N2 and EGT values." }, { "ch": "When is ignition automatically turned on during flight?", "ansGr": [ { "ans": [ "At top of descent ", "false" ] }, { "ans": [ "When EGT drops ", "false" ] }, { "ans": [ "During flameout detection or severe turbulence ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 74-11 – B787 RR Trent 1000 Training Material\nExplanation: The EEC activates ignition automatically under certain abnormal conditions like flameout or severe turbulence." }, { "ch": "What maintenance action is required if both igniters are inoperative?", "ansGr": [ { "ans": [ "Replace the EEC ", "false" ] }, { "ans": [ "Replace the ignition relay ", "false" ] }, { "ans": [ "Troubleshoot exciter and igniter plugs ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 74-11 – B787 RR Trent 1000 Training Material\nExplanation: If both igniters fail, start by verifying output at the exciter and checking continuity and insulation of the plugs and leads." }, { "ch": "What precaution must be taken when handling igniter plugs?", "ansGr": [ { "ans": [ "Immerse in oil ", "false" ] }, { "ans": [ "Do not touch electrodes or insulation ", "true" ] }, { "ans": [ "Clean with steel brush ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 74-11 – B787 RR Trent 1000 Training Material\nExplanation: Igniter plugs are sensitive to damage or contamination; contact with the tip can degrade insulation and spark quality." }, { "part": "ATA 75 – Air System", "ch": "What is the function of the customer bleed valve (CBV)?", "ansGr": [ { "ans": [ "Controls airflow to turbine ", "false" ] }, { "ans": [ "Diverts bleed air to cabin systems ", "true" ] }, { "ans": [ "Maintains fuel pressure ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 75-20 – B787 RR Trent 1000 Training Material\nExplanation: The CBV manages the delivery of high-pressure bleed air from the engine to aircraft systems such as ECS and anti-ice." }, { "ch": "Where is engine bleed air tapped from in the Trent 1000?", "ansGr": [ { "ans": [ "LPC only ", "false" ] }, { "ans": [ "IPC and HPC stages ", "true" ] }, { "ans": [ "LPT exit ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 75-20 – B787 RR Trent 1000 Training Material\nExplanation: Bleed air is drawn from both intermediate and high pressure compressor stages depending on power setting and demand." }, { "ch": "How is the HP check valve in the bleed system controlled?", "ansGr": [ { "ans": [ "By EICAS switches ", "false" ] }, { "ans": [ "It is a passive non-return valve ", "true" ] }, { "ans": [ "EEC sends electrical signals ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 75-20 – B787 RR Trent 1000 Training Material\nExplanation: The HP check valve is a passive component that prevents reverse flow when high pressure air is not required." }, { "ch": "What condition causes the high-stage valve to open?", "ansGr": [ { "ans": [ "High EGT ", "false" ] }, { "ans": [ "Low air demand ", "false" ] }, { "ans": [ "Low intermediate pressure ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 75-21 – B787 RR Trent 1000 Training Material\nExplanation: If IP pressure is insufficient to meet system demand, the high-stage valve opens to supply air from the high-pressure stage." }, { "ch": "What controls the operation of bleed air valves?", "ansGr": [ { "ans": [ "EICAS logic ", "false" ] }, { "ans": [ "The AIMS system ", "false" ] }, { "ans": [ "EEC based on demand and pressure sensors ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 75-21 – B787 RR Trent 1000 Training Material\nExplanation: The EEC monitors pressure and temperature data and commands valve actuation to regulate airflow and prevent overpressure." }, { "ch": "What safety device protects the bleed manifold from overpressure?", "ansGr": [ { "ans": [ "Fire loop ", "false" ] }, { "ans": [ "Pressure regulating shutoff valve ", "false" ] }, { "ans": [ "Overpressure relief valve ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 75-21 – B787 RR Trent 1000 Training Material\nExplanation: If bleed pressure exceeds limits, the overpressure relief valve opens to vent excess air and protect downstream systems." }, { "ch": "What happens if the bleed air temperature becomes excessive?", "ansGr": [ { "ans": [ "CBV closes and EICAS alerts the crew ", "true" ] }, { "ans": [ "Fan speed increases ", "false" ] }, { "ans": [ "Engine automatically reduces thrust ", "false" ] } ], "ref": "Ref (CAT B1) Answer: A - Ref: ATA 75-21 – B787 RR Trent 1000 Training Material\nExplanation: Over-temperature protection is built-in; the CBV will close to prevent further heating and signal is sent to EICAS." }, { "ch": "What component separates customer air and turbine cooling air?", "ansGr": [ { "ans": [ "Intercooler ", "false" ] }, { "ans": [ "Pre-cooler heat exchanger ", "true" ] }, { "ans": [ "Air separation valve ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 75-22 – B787 RR Trent 1000 Training Material\nExplanation: The pre-cooler moderates the temperature of bleed air before it’s routed to the ECS or used for turbine cooling." }, { "ch": "What must be verified before performing maintenance on the bleed air duct?", "ansGr": [ { "ans": [ "EEC is powered ", "false" ] }, { "ans": [ "That the duct is cooled down and depressurized ", "true" ] }, { "ans": [ "N1 is above idle ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 75-21 – B787 RR Trent 1000 Training Material\nExplanation: Hot pressurized air poses burn and rupture hazards. Always ensure the duct is cooled and depressurized before removal." }, { "ch": "What is the source of cooling air for the engine oil cooler?", "ansGr": [ { "ans": [ "LP turbine bypass air ", "true" ] }, { "ans": [ "Fuel system ", "false" ] }, { "ans": [ "Engine bleed air ", "false" ] } ], "ref": "Ref (CAT B1) Answer: A - Ref: ATA 75-22 – B787 RR Trent 1000 Training Material\nExplanation: Bypass air is used to cool the oil via a heat exchanger mounted on the fan case." }, { "ch": "What does an ENG BLEED OFF EICAS message typically indicate?", "ansGr": [ { "ans": [ "EEC has lost thrust control ", "false" ] }, { "ans": [ "CBV is closed ", "true" ] }, { "ans": [ "TAT probe has failed ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 75-21 – B787 RR Trent 1000 Training Material\nExplanation: The message is shown when the bleed air is no longer supplied due to CBV closure, either commanded or fault-induced." }, { "ch": "What type of sensor is used to monitor bleed air temperature?", "ansGr": [ { "ans": [ "Thermocouple ", "false" ] }, { "ans": [ "RTD (Resistance Temperature Device) ", "true" ] }, { "ans": [ "Pressure transducer ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 75-22 – B787 RR Trent 1000 Training Material\nExplanation: RTDs provide accurate temperature readings over a wide range and are commonly used in bleed air duct monitoring." }, { "ch": "What condition requires manual isolation of the bleed system?", "ansGr": [ { "ans": [ "APU not available ", "false" ] }, { "ans": [ "Engine fire or leak ", "true" ] }, { "ans": [ "In-flight icing ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 75-21 – B787 RR Trent 1000 Training Material\nExplanation: Bleed valves must be manually shut in the event of engine fire, bleed leak, or overheat to contain hazards." }, { "ch": "Where is turbine cooling air routed after use?", "ansGr": [ { "ans": [ "Overboard through fan duct ", "true" ] }, { "ans": [ "Back to bleed manifold ", "false" ] }, { "ans": [ "Into the exhaust mixer ", "false" ] } ], "ref": "Ref (CAT B1) Answer: A - Ref: ATA 75-22 – B787 RR Trent 1000 Training Material\nExplanation: After cooling turbine components, the air is exhausted through the fan duct, preventing heat accumulation." }, { "ch": "What controls cooling air flow to turbine disks?", "ansGr": [ { "ans": [ "Mechanical valve ", "false" ] }, { "ans": [ "EEC-controlled modulating valve ", "true" ] }, { "ans": [ "Cabin pressure system ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 75-22 – B787 RR Trent 1000 Training Material\nExplanation: The EEC uses modulating valves to control cooling air flow based on engine temperature and N2 speed." }, { "part": "ATA 76 – Engine Controls", "ch": "What is the primary function of the EEC in the Trent 1000?", "ansGr": [ { "ans": [ "Display N1 speed on the flight deck ", "false" ] }, { "ans": [ "Control thrust and manage engine parameters ", "true" ] }, { "ans": [ "Provide bleed air modulation ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 76-11 – B787 RR Trent 1000 Training Material\nExplanation: The EEC (Electronic Engine Controller) manages fuel flow, variable stator vanes, and thrust settings, ensuring safe and efficient engine operation." }, { "ch": "What power source normally supplies the EEC?", "ansGr": [ { "ans": [ "Aircraft battery ", "false" ] }, { "ans": [ "PMA (Permanent Magnet Alternator) ", "true" ] }, { "ans": [ "Generator control unit ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 76-11 – B787 RR Trent 1000 Training Material\nExplanation: Each EEC is powered by its dedicated PMA during normal engine operation; aircraft power is used only during start-up." }, { "ch": "Which control mode allows full EEC authority?", "ansGr": [ { "ans": [ "Soft reversionary mode ", "false" ] }, { "ans": [ "Hard manual mode ", "false" ] }, { "ans": [ "Normal mode ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 76-11 – B787 RR Trent 1000 Training Material\nExplanation: In normal mode, the EEC uses full input from sensors and FADEC logic to control engine parameters." }, { "ch": "What happens if the EEC loses its airframe data inputs?", "ansGr": [ { "ans": [ "It shuts down the engine ", "false" ] }, { "ans": [ "Switches to alternate mode ", "true" ] }, { "ans": [ "Maintains idle only ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 76-11 – B787 RR Trent 1000 Training Material\nExplanation: In the event of sensor input loss or signal fault, the EEC enters an alternate mode using internal schedules." }, { "ch": "What does the thrust lever angle (TLA) sensor provide to the EEC?", "ansGr": [ { "ans": [ "EGT limit ", "false" ] }, { "ans": [ "Thrust demand position ", "true" ] }, { "ans": [ "N2 overspeed protection ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 76-11 – B787 RR Trent 1000 Training Material\nExplanation: TLA sensors indicate pilot demand to the EEC, allowing it to calculate fuel flow and engine parameters accordingly." }, { "ch": "How are the engine control inputs transmitted to the EEC on B787?", "ansGr": [ { "ans": [ "Mechanically via cables ", "false" ] }, { "ans": [ "Through servo hydraulic links ", "false" ] }, { "ans": [ "Electrically via AIMS and throttle quadrant unit ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 76-11 – B787 RR Trent 1000 Training Material\nExplanation: The fly-by-wire throttle system transmits electrical signals from the AIMS to the EECs for thrust control." }, { "ch": "What controls the VSV (Variable Stator Vanes) and VBV (Variable Bleed Valves)?", "ansGr": [ { "ans": [ "AIMS ", "false" ] }, { "ans": [ "EEC ", "true" ] }, { "ans": [ "Hydraulic actuator ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 76-21 – B787 RR Trent 1000 Training Material\nExplanation: The EEC controls both VSV and VBV positions to optimize airflow through the engine." }, { "ch": "What component interfaces between the flight deck and engine control system?", "ansGr": [ { "ans": [ "Throttle quadrant unit (TQU) ", "true" ] }, { "ans": [ "FADEC relay ", "false" ] }, { "ans": [ "Generator control panel ", "false" ] } ], "ref": "Ref (CAT B1) Answer: A - Ref: ATA 76-11 – B787 RR Trent 1000 Training Material\nExplanation: The TQU sends electrical signals corresponding to throttle lever position to the EEC." }, { "ch": "Which mode does the EEC enter if PMA power is lost?", "ansGr": [ { "ans": [ "Alternate idle mode ", "false" ] }, { "ans": [ "Aircraft power backup mode ", "true" ] }, { "ans": [ "Limp-home mode ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 76-11 – B787 RR Trent 1000 Training Material\nExplanation: If the PMA fails, the EEC will revert to aircraft electrical power to maintain engine control." }, { "ch": "What protects the engine against N1 overspeed?", "ansGr": [ { "ans": [ "EEC software logic ", "true" ] }, { "ans": [ "Mechanical governor ", "false" ] }, { "ans": [ "Fuel spar valve ", "false" ] } ], "ref": "Ref (CAT B1) Answer: A - Ref: ATA 76-11 – B787 RR Trent 1000 Training Material\nExplanation: The EEC monitors N1 RPM and modulates fuel flow to prevent the fan from exceeding its design limit." }, { "ch": "What happens to the engine if both EECs fail?", "ansGr": [ { "ans": [ "It reverts to manual control ", "false" ] }, { "ans": [ "The engine flames out ", "false" ] }, { "ans": [ "It maintains last commanded thrust ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 76-11 – B787 RR Trent 1000 Training Material\nExplanation: A dual EEC failure causes the engine to freeze at its last commanded setting until shut down." }, { "ch": "How does the EEC prevent surge and stall during transients?", "ansGr": [ { "ans": [ "Opens the VSVs fully ", "false" ] }, { "ans": [ "Reduces fuel flow ", "false" ] }, { "ans": [ "Coordinates VBV and VSV operation with fuel metering ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 76-21 – B787 RR Trent 1000 Training Material\nExplanation: By adjusting airflow and fuel flow simultaneously, the EEC maintains stable compressor operation." }, { "ch": "What type of signals are used between AIMS and EEC?", "ansGr": [ { "ans": [ "Analog ", "false" ] }, { "ans": [ "Mechanical feedback ", "false" ] }, { "ans": [ "Digital ARINC 664 (AFDX) signals ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 76-11 – B787 RR Trent 1000 Training Material\nExplanation: The B787 uses AFDX (Avionics Full Duplex Switched Ethernet) for data transmission between systems like AIMS and EECs." }, { "part": "ATA 77 – Engine Indicating and Recording", "ch": "What system collects engine performance data for trending on the B787?", "ansGr": [ { "ans": [ "ACARS ", "false" ] }, { "ans": [ "AIMS with Quick Access Recorder (QAR) ", "true" ] }, { "ans": [ "Central Maintenance Computer (CMC) ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 77-00 – B787 RR Trent 1000 Training Material\nExplanation: AIMS transmits performance data to the QAR for maintenance trend monitoring and post-flight analysis." }, { "ch": "Where are engine vibration readings displayed?", "ansGr": [ { "ans": [ "Circuit breaker panel ", "false" ] }, { "ans": [ "EICAS display ", "true" ] }, { "ans": [ "Engine panel in cargo bay ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 77-11 – B787 RR Trent 1000 Training Material\nExplanation: Vibration levels are monitored by the EEC and displayed to the crew via the EICAS system." }, { "ch": "What sensors provide engine vibration data?", "ansGr": [ { "ans": [ "TAT sensors ", "false" ] }, { "ans": [ "Proximity probes on the fan case ", "false" ] }, { "ans": [ "Accelerometers on the engine bearing supports ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 77-11 – B787 RR Trent 1000 Training Material\nExplanation: Accelerometers mounted near engine bearings detect abnormal vibration levels in the rotating assemblies." }, { "ch": "What system enables post-flight engine maintenance download?", "ansGr": [ { "ans": [ "Dataload system ", "false" ] }, { "ans": [ "ACARS ", "false" ] }, { "ans": [ "Maintenance Access Terminal (MAT) ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C - Ref: ATA 77-00 – B787 RR Trent 1000 Training Material\nExplanation: The MAT connects to the AIMS to download recorded engine data for diagnostic purposes." }, { "ch": "How is EGT (Exhaust Gas Temperature) measured?", "ansGr": [ { "ans": [ "Using dual thermocouples in fan duct ", "false" ] }, { "ans": [ "Multiple thermocouples in turbine exhaust ", "true" ] }, { "ans": [ "Computed from N2 speed ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 77-20 – B787 RR Trent 1000 Training Material\nExplanation: Several thermocouples positioned around the turbine exhaust provide accurate EGT values to the EEC." }, { "ch": "What indicates an EGT exceedance on EICAS?", "ansGr": [ { "ans": [ "Amber “ENG OVHT” ", "false" ] }, { "ans": [ "Red “EGT LIMIT” ", "true" ] }, { "ans": [ "White “FUEL TEMP HIGH” ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 77-20 – B787 RR Trent 1000 Training Material\nExplanation: The EICAS alerts the crew to engine temperature exceedances with red EGT limit warnings." }, { "ch": "How is N1 calculated in the B787 Trent 1000?", "ansGr": [ { "ans": [ "Magnetic pickup on LP shaft ", "true" ] }, { "ans": [ "Computed from fan blade angle ", "false" ] }, { "ans": [ "Derived from fuel metering signal ", "false" ] } ], "ref": "Ref (CAT B1) Answer: A - Ref: ATA 77-11 – B787 RR Trent 1000 Training Material\nExplanation: N1 speed is measured by a magnetic sensor located on the LP rotor shaft." }, { "ch": "What condition may cause erratic engine parameter display?", "ansGr": [ { "ans": [ "VBV failure ", "false" ] }, { "ans": [ "EEC sensor fault ", "true" ] }, { "ans": [ "Fuel filter bypass ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 77-00 – B787 RR Trent 1000 Training Material\nExplanation: Sensor malfunctions feeding incorrect data to the EEC can result in erratic or invalid engine indications." }, { "ch": "Which component stores maintenance fault messages?", "ansGr": [ { "ans": [ "EEC ", "false" ] }, { "ans": [ "AIMS Maintenance Function ", "true" ] }, { "ans": [ "Data concentrator unit ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 77-00 – B787 RR Trent 1000 Training Material\nExplanation: AIMS maintains an internal maintenance log that records engine fault messages and performance events." }, { "ch": "How is oil pressure displayed to the flight crew?", "ansGr": [ { "ans": [ "On the center console gauge ", "false" ] }, { "ans": [ "As digital data on the EICAS ", "true" ] }, { "ans": [ "On the MAT screen ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 77-30 – B787 RR Trent 1000 Training Material\nExplanation: Engine oil pressure is digitally transmitted and shown on the EICAS display." }, { "ch": "What action is triggered if N2 overspeed is detected?", "ansGr": [ { "ans": [ "Engine shutdown ", "false" ] }, { "ans": [ "Fuel metering valve closure ", "true" ] }, { "ans": [ "No action unless EGT is also high ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 77-11 – B787 RR Trent 1000 Training Material\nExplanation: If the EEC detects an N2 overspeed, it closes the metering valve to reduce fuel flow and lower RPM." }, { "ch": "What is the function of the Engine Condition Monitoring System (ECMS)?", "ansGr": [ { "ans": [ "Real-time fan blade vibration alerts ", "false" ] }, { "ans": [ "Collection and transmission of engine performance data ", "true" ] }, { "ans": [ "Displays oil temperature in degrees C ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B - Ref: ATA 77-00 – B787 RR Trent 1000 Training Material\nExplanation: ECMS monitors and logs engine performance data to aid in predictive maintenance and health trend analysis." }, { "part": "ATA 78 – Exhaust", "ch": "What is the primary function of the exhaust nozzle in the Trent 1000?", "ansGr": [ { "ans": [ "Reduce engine vibration ", "false" ] }, { "ans": [ "Convert thermal energy into thrust ", "true" ] }, { "ans": [ "Divert hot air to the nacelle ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B – Ref: ATA 78-00 – B787 RR Trent 1000 Training Material\nExplanation: The exhaust nozzle channels and accelerates exhaust gases to create thrust through momentum transfer." }, { "ch": "How is the exhaust system cooled during flight?", "ansGr": [ { "ans": [ "Fuel-cooled tubing ", "false" ] }, { "ans": [ "Ambient air through passive airflow ", "false" ] }, { "ans": [ "Fan bypass air ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C – Ref: ATA 78-10 – B787 RR Trent 1000 Training Material\nExplanation: Fan bypass air flows around the hot sections of the engine, including the exhaust, to prevent overheating." }, { "ch": "What is the purpose of the exhaust cone?", "ansGr": [ { "ans": [ "Reduces backpressure ", "false" ] }, { "ans": [ "Directs exhaust flow smoothly ", "true" ] }, { "ans": [ "Supports the LPT shaft ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B – Ref: ATA 78-00 – B787 RR Trent 1000 Training Material\nExplanation: The exhaust cone smooths the gas flow path and minimizes turbulence, contributing to efficient engine operation." }, { "ch": "What component connects the core and fan exhaust flows?", "ansGr": [ { "ans": [ "Bypass duct ", "false" ] }, { "ans": [ "Mixer unit ", "true" ] }, { "ans": [ "HP compressor bleed port ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B – Ref: ATA 78-10 – B787 RR Trent 1000 Training Material\nExplanation: The mixer unit combines the cooler bypass air with the hotter core exhaust gases for noise and thrust efficiency." }, { "ch": "How is the exhaust nozzle attached to the engine?", "ansGr": [ { "ans": [ "Welded directly to the fan case ", "false" ] }, { "ans": [ "Bolted to the turbine rear frame ", "true" ] }, { "ans": [ "Integrated with the turbine blades ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B – Ref: ATA 78-10 – B787 RR Trent 1000 Training Material\nExplanation: The nozzle is secured to the turbine rear frame using bolts, enabling ease of removal during maintenance." }, { "ch": "What could high EGT with normal N1/N2 indicate related to the exhaust system?", "ansGr": [ { "ans": [ "Engine fire ", "false" ] }, { "ans": [ "Blocked or damaged exhaust nozzle ", "true" ] }, { "ans": [ "Low oil pressure ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B – Ref: ATA 78-00 – B787 RR Trent 1000 Training Material\nExplanation: A damaged or restricted nozzle could increase exhaust backpressure, leading to higher EGT." }, { "ch": "What material is commonly used for the exhaust nozzle?", "ansGr": [ { "ans": [ "Titanium alloy ", "false" ] }, { "ans": [ "Carbon fiber ", "false" ] }, { "ans": [ "Inconel or high-temperature nickel alloy ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C – Ref: ATA 78-10 – B787 RR Trent 1000 Training Material\nExplanation: High-temperature resistant alloys like Inconel are used in exhaust systems to withstand thermal and mechanical stress." }, { "ch": "What inspection method is used to check for cracks in the exhaust duct?", "ansGr": [ { "ans": [ "Ultrasonic inspection ", "false" ] }, { "ans": [ "Fluorescent penetrant inspection (FPI) ", "true" ] }, { "ans": [ "Radiographic imaging ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B – Ref: ATA 78-00 – B787 RR Trent 1000 Training Material\nExplanation: FPI is commonly used for detecting surface cracks in high-temperature components like exhaust ducts." }, { "ch": "What component helps reduce noise in the exhaust flow?", "ansGr": [ { "ans": [ "Acoustic panel ", "false" ] }, { "ans": [ "Bypass valve ", "false" ] }, { "ans": [ "Exhaust mixer ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C – Ref: ATA 78-10 – B787 RR Trent 1000 Training Material\nExplanation: The exhaust mixer reduces engine noise by blending high-speed hot gas with cooler bypass air more gradually." }, { "ch": "Where is exhaust system damage likely to cause abnormal vibration?", "ansGr": [ { "ans": [ "Low pressure spool ", "false" ] }, { "ans": [ "Turbine rear frame ", "false" ] }, { "ans": [ "Exhaust cone or nozzle ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C – Ref: ATA 78-00 – B787 RR Trent 1000 Training Material\nExplanation: Damage to the cone or nozzle may disrupt gas flow symmetry and balance, leading to detectable vibration." }, { "part": "ATA 79 – Oil System", "ch": "What component supplies oil to the Trent 1000 engine bearings?", "ansGr": [ { "ans": [ "Engine-driven oil pump ", "true" ] }, { "ans": [ "External hydraulic reservoir ", "false" ] }, { "ans": [ "PMA lubrication unit ", "false" ] } ], "ref": "Ref (CAT B1) Answer: A – Ref: ATA 79-00 – B787 RR Trent 1000 Training Material\nExplanation: The engine-driven oil pump ensures continuous oil flow to bearings and gears during engine operation." }, { "ch": "How is the Trent 1000 oil tank vented?", "ansGr": [ { "ans": [ "Sealed under pressure ", "false" ] }, { "ans": [ "Through an overboard vent line ", "true" ] }, { "ans": [ "Through an oil-to-air cooler ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B – Ref: ATA 79-10 – B787 RR Trent 1000 Training Material\nExplanation: The oil tank is vented overboard to prevent overpressure and allow for proper breathing of the system." }, { "ch": "What is the function of the scavenge pump in the oil system?", "ansGr": [ { "ans": [ "Inject oil into the bearings ", "false" ] }, { "ans": [ "Return oil from bearings to the tank ", "true" ] }, { "ans": [ "Filter oil before combustion ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B – Ref: ATA 79-10 – B787 RR Trent 1000 Training Material\nExplanation: The scavenge pump returns used oil from bearing compartments to the tank, completing the lubrication cycle." }, { "ch": "Where is the oil temperature measured?", "ansGr": [ { "ans": [ "At the tank inlet ", "false" ] }, { "ans": [ "In the gearbox ", "false" ] }, { "ans": [ "After the oil cooler ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C – Ref: ATA 79-20 – B787 RR Trent 1000 Training Material\nExplanation: The temperature is measured after the oil passes through the cooler, ensuring it's within operational limits." }, { "ch": "What protects the engine from loss of oil pressure?", "ansGr": [ { "ans": [ "Oil pressure bypass valve ", "false" ] }, { "ans": [ "Redundant fuel system ", "false" ] }, { "ans": [ "EICAS alert and auto-shutdown logic ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C – Ref: ATA 79-30 – B787 RR Trent 1000 Training Material\nExplanation: In case of oil pressure loss, the EICAS alerts the crew and the EEC may command a shutdown to prevent engine damage." }, { "ch": "What is the function of the oil pressure relief valve?", "ansGr": [ { "ans": [ "Prevent cavitation in fuel system ", "false" ] }, { "ans": [ "Prevent overpressure in oil lines ", "true" ] }, { "ans": [ "Divert oil to scavenge pump ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B – Ref: ATA 79-10 – B787 RR Trent 1000 Training Material\nExplanation: It opens when oil pressure exceeds limits, diverting excess oil back to the tank to prevent line damage." }, { "ch": "How is the Trent 1000 oil system cooled?", "ansGr": [ { "ans": [ "Fan air through ram inlet ", "false" ] }, { "ans": [ "Using bypass air through heat exchanger ", "true" ] }, { "ans": [ "Via intercooler from APU ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B – Ref: ATA 79-20 – B787 RR Trent 1000 Training Material\nExplanation: The oil cooler uses engine bypass air in a heat exchanger mounted in the fan duct to cool the oil." }, { "ch": "What could be a result of clogged oil filters?", "ansGr": [ { "ans": [ "Drop in N1 speed ", "false" ] }, { "ans": [ "Oil bypass indication on EICAS ", "true" ] }, { "ans": [ "Over-temperature in turbine section ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B – Ref: ATA 79-10 – B787 RR Trent 1000 Training Material\nExplanation: If filters clog, a bypass occurs, and the EICAS will alert the crew to potential contamination or blockage." }, { "ch": "What indicates impending failure of the oil pump?", "ansGr": [ { "ans": [ "High vibration ", "false" ] }, { "ans": [ "Rising oil consumption ", "false" ] }, { "ans": [ "Low oil pressure and increasing temperature ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C – Ref: ATA 79-30 – B787 RR Trent 1000 Training Material\nExplanation: A failing oil pump will show reduced pressure and potentially overheating due to lack of lubrication." }, { "ch": "How many scavenge elements are typically found in the Trent 1000 oil system?", "ansGr": [ { "ans": [ "One ", "false" ] }, { "ans": [ "Two ", "false" ] }, { "ans": [ "Multiple (5 or more) ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C – Ref: ATA 79-10 – B787 RR Trent 1000 Training Material\nExplanation: The engine has multiple scavenge elements to return oil from various bearing compartments efficiently." }, { "part": "ATA 80 – Starting System", "ch": "What type of starter system is used on the Trent 1000 engine?", "ansGr": [ { "ans": [ "Electric motor starter ", "false" ] }, { "ans": [ "Air turbine starter ", "true" ] }, { "ans": [ "Hydraulic impulse starter ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B – Ref: ATA 80-00 – B787 RR Trent 1000 Training Material\nExplanation: The B787 Trent 1000 uses a conventional air turbine starter powered by the APU or ground pneumatic source to spin the engine." }, { "ch": "What controls the engine start sequence on the B787?", "ansGr": [ { "ans": [ "Manual pilot input via starter switch ", "false" ] }, { "ans": [ "EEC in conjunction with APU controller ", "true" ] }, { "ans": [ "AIMS using mechanical relays ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B – Ref: ATA 80-00 – B787 RR Trent 1000 Training Material\nExplanation: The Electronic Engine Control (EEC) manages the full start sequence, receiving input from the APU controller and controlling air and fuel delivery." }, { "ch": "What is the role of the starter air valve (SAV)?", "ansGr": [ { "ans": [ "Regulates oil pressure during start ", "false" ] }, { "ans": [ "Supplies air to APU ", "false" ] }, { "ans": [ "Opens to allow pneumatic air to the air turbine starter ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C – Ref: ATA 80-00 – B787 RR Trent 1000 Training Material\nExplanation: The SAV is an electrically controlled valve that opens during engine start to route pneumatic air to the starter motor." }, { "ch": "What happens if the starter air valve fails to close after engine start?", "ansGr": [ { "ans": [ "Engine shutdown is commanded ", "false" ] }, { "ans": [ "EICAS message is generated and crew notified ", "true" ] }, { "ans": [ "Fuel flow is stopped ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B – Ref: ATA 80-00 – B787 RR Trent 1000 Training Material\nExplanation: If the SAV remains open, it can result in high airflow and pressure loss. EICAS generates a “STARTER VALVE OPEN” caution message." }, { "ch": "What is the purpose of the start valve position sensor?", "ansGr": [ { "ans": [ "Indicates valve failure for EICAS ", "true" ] }, { "ans": [ "Adjusts starter air pressure ", "false" ] }, { "ans": [ "Controls igniter timing ", "false" ] } ], "ref": "Ref (CAT B1) Answer: A – Ref: ATA 80-00 – B787 RR Trent 1000 Training Material\nExplanation: This sensor feeds back the open/closed status of the SAV to the EEC and crew via EICAS for system integrity monitoring." }, { "ch": "At what N2 speed does fuel typically flow to the engine during start?", "ansGr": [ { "ans": [ "5% ", "false" ] }, { "ans": [ "15% ", "false" ] }, { "ans": [ "25% ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C – Ref: ATA 80-00 – B787 RR Trent 1000 Training Material\nExplanation: Once the N2 spool reaches approximately 25%, the EEC commands fuel introduction and ignition." }, { "ch": "What air source can be used for engine starting on the ground?", "ansGr": [ { "ans": [ "Ram air only ", "false" ] }, { "ans": [ "APU or external air cart ", "true" ] }, { "ans": [ "Cabin recirculation fans ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B – Ref: ATA 80-00 – B787 RR Trent 1000 Training Material\nExplanation: Either APU bleed air or a ground air cart can be used to supply the pneumatic air needed to drive the starter." }, { "ch": "What condition prevents engine start initiation?", "ansGr": [ { "ans": [ "N1 above 5% ", "true" ] }, { "ans": [ "Starter air valve open ", "false" ] }, { "ans": [ "Fuel temperature below freezing ", "false" ] } ], "ref": "Ref (CAT B1) Answer: A – Ref: ATA 80-00 – B787 RR Trent 1000 Training Material\nExplanation: If N1 is above 5%, it indicates the engine is already rotating or not in a safe condition for start." }, { "ch": "What EICAS alert appears for failed engine start?", "ansGr": [ { "ans": [ "ENG FAIL ", "false" ] }, { "ans": [ "STARTER ENGAGED ", "false" ] }, { "ans": [ "START ABORT ", "true" ] } ], "ref": "Ref (CAT B1) Answer: C – Ref: ATA 80-00 – B787 RR Trent 1000 Training Material\nExplanation: If the EEC detects a failed start, such as lack of N2 or EGT rise, it aborts the start and triggers the START ABORT message." }, { "ch": "What component prevents excessive torque transmission from the starter to the engine?", "ansGr": [ { "ans": [ "Gearbox lockout pin ", "false" ] }, { "ans": [ "Shear coupling ", "true" ] }, { "ans": [ "Start control relay ", "false" ] } ], "ref": "Ref (CAT B1) Answer: B – Ref: ATA 80-00 – B787 RR Trent 1000 Training Material\nExplanation: The shear coupling protects the starter drive and engine by disconnecting mechanically if excessive torque is transmitted during start." } ]