Motor PW4000

(ATA29) Access to the EDP is through which cowling?. Left thrust reverser half. Right thrust reverser half. Fan cowl panel.

(ATA 72) During borescope, how must the HP compressor be turned?. At the N1 crank pad on the fan case. By turning the fan blades manually. At the N2 crank pad on the main gearbox.

(ATA 30) Where is the Engine Anti-Ice (EAI) controller on the engine?. On the left side of the engine fan case at the 9:00 position. On the right side of the engine fan case at the 3:30 position between the PRSOVC and HPFAC. On the core cowl at the 6:00 position.

(ATA 30) What stage of air is used for engine cowl anti-ice?. HP8. HP12. HP15.

Which parameters are used by the EEC in calculating EPR?. P3 & P2. P4.95 & P2. P4.95 & P3.

What is the purpose of the FMU pressure regulator valve?. Control fuel temperature. Keep a constant differential pressure across the metering valve. Shut off fuel in case of overspeed.

What type of fuel is sent to the servo fuel heater?. Low pressure fuel from the boost pump. Metered fuel from the FMU. High pressure fuel from the main stage pump.

Which two of the following actuators are locking actuators?. Upper and Center actuator. Center and Lower actuator. Upper and Lower actuator.

The EEC monitors the reverser position by using which of the following?. LVDT signals. Proximity sensors. RVDT signals.

Where can the reverser sleeve position be observed?. EICAS primary page. EPCS maintenance page 1. Status page only.

During starter re-engagement, how does the EEC match the speed of the starter to prevent crashre-engagement?. Adjusts fuel flow to the engine. Energizes and de-energizes the SAV solenoid. Uses the N2 speed sensor only.

Where do the thrust commands to the EEC come from?. AIMS only in automatic mode. Thrust lever angle resolver in all operating modes. FMC in all modes.

How does the Autothrottle Servo Motor (ASM) backdrive the resolver?. With a flexible cable. With a drive pin. With a gear train.

Where is the Intermediate Pressure sensor on the engine?. Core case at the 6:00 position. Fan case at the 3:00 position. Diffuser case at the 12:00 position.

What information does the EEC provide to the ASCPC for its control?. PS3 (15th stg), N1 and P0. N2, P2 and oil pressure. PS3, N2 and fuel flow.

Where and how many IP check valves are found on each engine pneumatic system?. 1 IPCV next to a 15th stage bleed air port. 2 IPCV next to an eighth stage bleed air ports in the engine ducting. 3 IPCV near the precooler.

How is the backup generator oil cooled?. Fuel only. Fan air or 2.5 bleed air. Oil/oil heat exchanger.

How is the ignition system hardware cooled?. Engine oil. The Fan Air. Bleed air from 8th stage.

What is the access to the strut overheat detectors?. Through panels on the top of the wing. Through two panels on the bottom of the fixed leading edge. From inside the cabin.

When opening the fan cowl, the collar of the hold open rods is not locked when: Green stripe is visible. Red stripe at the lock collar is visible. No stripe is visible.

What does the Power Door Opening System (PDOS) use to close the cowlings?. Hydraulic power. Electric motors. Gravity.

How many turbine stages drive the high pressure compressor?. 1. 2. 3.

What kind of bearing is fitted to the number 4 bearing position?. Ball bearing. Roller bearing. Thrust bearing.

Where can you find the data plate with information on the EEC programming plug data?. RH side of the main gearbox. LH side of the main gearbox. Inside the EEC housing.

How many times can a key washer be used?. Unlimited times if undamaged. It can only be used one time. Twice maximum.

What stage air does the TVBC system use?. 8th stage only. 12th stage only. 12th and 15th stages.

What is the muscle power for the TCC actuator operation?. Hydraulic pressure. Pneumatic pressure. Servo Fuel Pressure.

What is the maximum time allowed for the engine oil levels to be checked to prevent the need for a drymotoring?. 30 minutes. 2 hours. 1 hour.

What component is used to drive the butterflies that control cooling air flow?. A simple solenoid valve. A servo-fuel-operated actuator. An electric motor actuator only.

How many butterflies does the actuator drive?. Two. Three. Four.

What is the primary function of the butterflies controlled by the actuator?. To regulate fuel flow to the IDG. To control the flow of operating / cooling air. To open the generator cooling doors on the ground only.

Which air sources can be used to cool / supply the generators, depending on engine power setting?. Only high-pressure compressor bleed air. Fan air or stage 2.5 (low-pressure compressor discharge). The number of cooling fans.

Why does the instructor emphasize that the air source can be fan air or 2.5?. Because the sources are identical at all times. Because the source changes according to the engine power setting. Because only one source is ever available.

Which statement is true regarding the fuel-oil feed system?. It exists for both the IDG and the backup generators. It exists only for the Integrated Drive Generator (IDG). It is used only when the aircraft is on the ground.

Does the same cooling-air control principle apply to a degraded IDG?. No – a completely different system is used. Yes – the same principle applies to the degraded IDG. Only if the backup generator is also failed.

How many fire detectors are installed on the Pratt & Whitney engine discussed?. Two (upper and lower only). Four (one in each quadrant). Three (upper, lower, and lower-forward).

How are the fire detectors connected?. In a single continuous loop. Independently to the fire-control unit with no loops. Connected together to create two loops (Loop 1 and Loop 2).

What does “2.5” refer to in this context?. A pressure of 2.5 bar. Low-pressure compressor discharge (stage 2.5). The high-pressure turbine stage.

. What is the standard dual-loop fire-detection logic?. Either loop alone is sufficient to declare a fire. Both loops must report fire while both are healthy. The system waits for three successive detections before declaring fire.

Where is the fan overheat detector located on the PW4000?. Right-hand side of the fan case. Left-hand side of the fan case. Inside the core compartment only.

What is the principal difference noted for the Engine Driven Pump (EDP) between engines?. The type of hydraulic fluid used. Whether it is electrically or mechanically driven. Its location (on this installation: right-hand / upper face of the main gearbox).

(ATA 30) What type of valve is the engine anti-ice valve?. Pneumatically operated, piston-type valve. Hydraulically operated spool valve. Manually operated butterfly valve.

(ATA 30) Where is the engine anti-ice valve located on the Pratt & Whitney 4000?. Right-hand side of the fan case at 3 o’clock. Left-hand side of the engine core at the 8 o’clock position. Top of the accessory gearbox.

(ATA 30) What controls the operating pressure of the engine anti-ice valve?. A purely mechanical spring and bellows. An electro-pneumatic controller. The aircraft hydraulic system.

(ATA 36) From which compressor stages is bleed air extracted on the PW engine discussed?. Only the 5th stage of the low-pressure compressor. The 8th stage or the 15th stage of the high-pressure compressor. Only the 15th stage; the 8th stage is never used.

(ATA 36) What parameters influence the switching between the 8th and 15th stage bleed?. Engine parameters received by the controllers. Hydraulic system pressure only. Pilot selection only via a switch.

(ATA 26) Which systems are described as essentially common across the different engine types?. Only the location of the EDP. Fire handles, fire indications (EICAS/panel) and fire-test procedures. The exact compressor-stage bleed ports.