RR TRENT 1000

What is the function of the PDOS hydraulic power pack located on the fan cowl support beam?. To supply bleed air for inlet cowl anti-icing. To provide independent hydraulic power to open cowls and thrust reversers. To control engine oil pressure during startup.

How does the fan cowl actuator maintain the cowl in the open position without hydraulic power?. By locking the hinges manually. By using backup electrical pressure. Via internal mechanical lock mechanism.

- What electrical source powers the PDOS fan cowl control switches?. - 28V DC from the aircraft main bus. - 115V AC from the EICAS. - 400Hz AC from the auxiliary generator.

- During manual operation of the PDOS, what component enables connection of a hand pump?. - Control rack solenoid. - Quick Disconnect Manifold. - Thrust reverser access hatch.

- What structural component ensures equal thrust load distribution to the aft engine mount?. - Fan cowl support beam. - Evener bar with thrust links. - Intermediate torque plate.

- What is the primary cooling function of the inlet cowl’s zone 1 ventilation scoop?. - Direct bleed air into core zone 2. - Reduce EGT during climb. - Ventilate engine zone 1 fire compartment.

- What device prevents fluid from exiting the drains collector tank under normal conditions?. - Overboard ejector valve. - Spring-loaded non-return valve. - Float level sensor.

- Where are the PDOS thrust reverser switches physically located for activation?. - Under the pylon leading edge fairing. - Inside the fan compartment, aft bulkhead of inlet cowl. - At the cockpit overhead panel.

- Why is it critical to match VFSG cooler blanking plates during engine intermix operations?. - To standardize engine weight distribution. - To allow compatibility between Package C1 and Trent TEN configurations. - To synchronize bleed air routing across engines.

- Which hazard area around the RR Trent 1000 engine extends furthest during takeoff power?. - Exhaust hazard zone. - Inlet hazard zone – up to 63 ft forward radius. - Noise hazard zone.

- What enables thrust reverser sleeves to move during deployment?. - Pneumatic spring return system. - 5,000 psi hydraulic actuators on tracks. - Electrically driven gearboxes.

- What feature of the fan cowl helps delay wing stall at high angles of attack?. - Acoustic lining. - Adjustable louver vents. - Aerodynamic chine (vortex control device).

- What triggers the float valve in the drains collector tank to close during startup?. - Hydraulic feedback from the gearbox. - Decrease in tank fuel level to prevent air ingestion. - Increase in pressure from the EDP system.

- Why are thrust links critical to the aft mount system?. - They transmit fan-generated thrust from the core to the aft mount. - They absorb vibration from oil tank assemblies. - They stabilize the inlet cowls.

- What is the max wind speed limit for safely opening the fan cowls?. - 40 knots. - 55 knots. - 25 knots.

- Where is the test enable switch located for thrust reverser PDOS activation?. - Pylon upper fairing. - Aft bulkhead inside the inlet cowl. - Left fan cowl inner panel.

- What visual cue confirms that a hold-open rod is securely locked?. - Flashing LED on cowl latch. - Yellow marking visible inside locking collar. - Red band aligned with fan case slot.

- How does the engine electrical harness transmit LPT overspeed data?. - Optical sensor network from exhaust nozzle. - Phonic wheel + braided cable to EEC. - Magnetic slip ring at engine strut.

- Why does the nacelle incorporate chevrons on translating sleeves?. - To limit airflow velocity at high altitude. - To reduce noise by blending bypass and ambient airflow. - To direct airflow toward pressure sensor array.

- Which PDOS component physically lifts the cowls?. - Switch actuator solenoids. - Return spring assemblies. - Hydraulic linear actuators with mechanical locks.

- How does the PDOS actuator behave once hydraulic pressure is removed?. - Remains extended via mechanical lock until manually released. - Unlocks via solenoid override and power down. - Automatically retracts due to internal spring tension.

- What condition activates the drain tube overflow outlet from the drains collector tank?. - HMU engages the recirculation sequence in-flight. - Tank reaches capacity and ejector system is bypassed. - Pressure drop across fuel filter exceeds limit.

- Where is the PDOS hydraulic power pack mounted?. - On the fan cowl support beam forward of the engine strut. - Beneath the thrust reverser actuator housing. - Inside the aft cowl near the oil tank.

- What is the function of chevrons located on thrust reverser translating sleeves?. - Promote smoother bypass air mixing for noise reduction. - Redirect exhaust flow during idle tax. - Increase reverse thrust effect.

- What structural component allows thrust reversers to stay open without active pressure?. - Toggle lock embedded in cowl structure. - Internal actuator mechanical lock. - Secondary hinge compression clip.

- How is the drain mast attached to the external gearbox?. - Via bracket fixed to the forward face at the 6:00 position. - Suspended from the nacelle outer barrel. - Bonded thermally near the thrust link evener bar.

- Why do VFSG blanking plates matter for intermix compatibility?. - Prevent core casing mismatches in airflow. - Ensure oil cooler ducting aligns between Package C1 and TEN engines. - Provide thermal isolation between fan modules.

- What is a key operational difference between opening fan cowls and thrust reversers using PDOS?. - Fan cowls require dual switch activation. - Thrust reverser switches are only accessible when fan cowls are already open. - Fan cowls are spring-assisted, reversers are gravity-actuated.

- Which indicator confirms that the thrust reverser hold-open rod is unlocked?. - Red marking visible on locking collar. - LED signal from PDOS rack. - Audible click during sleeve movement.

- What enables manual actuation of PDOS components if electrical power is unavailable?. - Electric override switch on the EICAS. - Hand pump connected to the QD manifold. - Pushbutton solenoid reset module in the power rack.