Conventional gas turbine engines cannot perform as efficiently as the PW1100G-JM. The low compressor and low turbineare restricted to less-than- optimaloperating speeds so that… 

Lightning strike protection in the inlet cowl is provided by… 

What devices provide maintenance access to Thrust Reverser Torque Box?

Strakes are mounted to the fan cowl outer surface to improve flight characteristics by controlling airflow. Where are these devices mounted?

This mount reacts to engine fore-aft, side, vertical, and rolls loads. Which one?

What is a term describing the engine modules that make up the primary path of airflow through the engine?

Bearing support the weight of engine parts and permit one surface to roll over another with minimal friction and wear. What loads withstand the tapered roller bearings?

How do we name bearing that use a thin film of oil between the outer race and the bearing support to reduce vibration? 

Some carbon face seals are called lift-off seals because extra air used to physically lift the seal off the ring during engine operation. Which bearing use this seal type? 

What devices are installed beneath the fan blades to provide a radial preload of the blades, which also reduces fan rotor vibration? 

This is a component of the fan case assembly, which straighten and direct the fan discharge airstream. They supply structural support of flight and blade-out loads and also and provide radial support of the engine. Which one? 

In the FDGS, the star gear and the carrier to which they are attached do not move around the sun gear. The sun gear engages the star gears, moving them in a direction that causes the outer ring gear and fan to turn in the opposite direction from the sun gear and LPC/LPT, at a slower speed. What allows this design to increasing compressor efficiency? 

In the HPC there are eight HPC rotor tubes held in a ring. These tubes turn with the rotor and push air to the center of the rotor where this air can flow to where it is necessary for cooling and pressure balance.Where these tubes are located? 

This mode permits the EEC to switch control of the fault loop to the standby channel, keeping control of the remaining functions with the original channel selected for that flight. Which mode is this? 

Core harnesses, designated as W or WC, are attached to… 

Which sensor is used by the EEC to calculate engine inlet air pressure (P2) and to validate an independent air pressure reading from the aircraft? 

On the fuel distribution system, the main and servo pumps each have pressure relief valves that limit the developing absolute pressure to a pre-set design value. The valves are spring-loaded closed, opening when fuel pressure exceeds a predetermined limit. Fuel that flows past the pressure relief valves bypasses the fuel pump exit.Where this fuel is recirculated back to? 

This component supplies mounting and sealing of the IFPC, the fuel return pump, the Fuel Filter Differential Pressure (FFDP) sensor and the fuel filter housing assembly. It also transfers fuel between the components and serves as the connection point for external fuel lines. Which one? 

The Fuel Indicating System monitors fuel flow and sends messages to the flight deck display about the system status and possible fuel filter clogs.Which one IS NOT a component of this system? 

Each engine has two independent ignition systems designed for continuous operation. Normally the systems alternate, but they can be used simultaneously under some conditions.Which is one?

When using the Manual Start Ignition selection, the EEC energizes both igniters.Based on what logic and aircraft inputs? 

The starter incorporates a single stage turbine wheel, single piece output shaft, and a ratchet and pawl clutch. The starter gears and bearing are splash lubricated. Where these take oil from? 

The starter speed sensor detects the starter ring gear speed by detecting each tooth as it passes the tip of the magnetic probe. The teeth of the ring gear passing by the face of the magnet produce a change in the magnetic field. The time-varying electrical pulse signal is processed by the EEC and PHMU and converted to a rotational speed. How the EEC determine if the starter has failed? 

During engine operation, the EEC sends electrically isolated drive signals to the dual channel torque motor that is part of the LPC SVA. The drive signals direct pressurized fuel to either side of the actuator piston to achieve the commanded position. What happen if there is a loss of electrical power to the torque motor? 

This component provides discrete (on/off) control of HPC 3rd Stage servo pressure sent to the HPC active bleed air valve. Which one? 

The Turbine Cooling Air (TCA) System provides continuous cooling air to the High Pressure Turbine, and to the Turbine Intermediate Case/ Low Pressure Turbine. Which is one engine part cooled by this system? 

This system cools the No. 4 Bearing compartment by sending 3rd Stage high compressor bleed air through the Buffer Air Heat Exchanger.Which one? 

On N1 speed sensor, each time one of the teeth passes the N1 speed sensor, a change occurs in the magnetic field. The change produces a signal frequency that the EEC will use to calculate an N1 speed proportional to the coupling’s rotational speed. The short tooth will cause a different frequency. Which is used this frequency to? 

Where the Cold Junction Compensation (CJC) used by the EEC to compute Exhaust Gas Temperature is located? 

This system makes the path for the turbine gases exiting the engine core. It gives direction to the turbine gases, which helps to increase thrust and reduce turbulence. Which one? 

What component provides thrust reverser support and protects the engine’s core cases and externals and forms the inner surface of the duct for fan bypass air? 

Which System of the thrust reverser is used to limit the deflection of the fixed structure, and to maintain the structural integrity in the event of a burst air duct? 

This component of the thrust reverser actuation system (TRAS) provides a path for hydraulic system pressure to be ported from the Hydraulic Control Unit to the TRAS actuators. Which one? 

What device on the oil system prevents engine operation without a filter installed? 

Maximum oil flow to lubricate the gear faces of the FDGS is required only at take-off. At cruise, oil flow is reduced and sent back to the oil tank. Less oil flowing to the gears reduces the oil heat load and increases fan drive gearbox efficiency. When in the fail safe position the valve reverts to maximum oil flow.Which valve allows the diversion of supply oil from the FDGS to the oil tank controlled by the EEC? 

Which valve controls and distributes oil flow between the Fuel/Oil Heat Exchanger and the Air/Oil Heat Exchanger controlled by the EEC? 

In the auxiliary lubrication system, on what event the windmill/auxiliary pump draws oil through the compartment sump, which is continually replenished by oil cast off from the gear system and main shaft bearings? 

This assembly keeps the auxiliary oil pump gear turning in the same direction during windmill conditions, regardless of the direction in which the fan shaft turns. Which one? 

In hot conditions, oil flows from the IDG to the core of the Oil/Oil Heat Exchanger, transferring heat. This usually occurs when the engine is at idle and the generator oil system is hotter than the engine oil system. 2. In normal conditions, heat is transferred to the IDG oil from the engine oil. The oil continues downstream to the IDG Fuel/Oil Heat Exchanger, where more cooling may take place. Of the mentioned statement: 

In the nacelle anti-ice protection system, the upper and lower PRSOVs are not interchangeable. A valve clocking feature distinguishes the ducts on the upper and lower valve types, preventing incorrect installation.Why these valves cannot be interchanged?*