CHAPTER 70s (IAE V2500) Flashcards
How is the number 4 bearing compartment cooled?
The air-cooled air cooler cools the 12th stage air of the HPC with fan air before going into the Nº4 bearing compartment. The fan air is then discharged overboard.
When engaged, when does the auto thrust function becomes inactive?
When engaged, the auto thrust function becomes inactive when the throttle levers are set above CL with 2 engines running. The EPR
command corresponds to the TRA.
How is the speed of the HP rotor indicated?
The speed of the HP rotor is indicated on the ECAM as N2.
How is Reverse thrust controlled?
Reverse thrust is controlled by the EEC and is only available on the ground.
How is autothrust disconnected?
The autothrust can be disconnected with the two red buttons known as instinctive disconnect pushbuttons (2 red buttons on the outside of each throttle control lever). This lets the engines be controlled in
manual thrust mode.
What heat management system is the fail safe mode?
Mode 5
How is the FADEC powered under normal conditions?
The FADEC system is self-powered by a dedicated Permanent Magnet Alternator (PMA) when N2 is greater than 10%. The EEC is powered by the aircraft 28 VDC electrical network for starting, as a backup and for testing with the engine not running.
The Booster Stage Bleed Valve (BSBV) is controlled by solenoid action. With the solenoid energised what position will the bleed valve be in?
Bleed valve will be closed.
What is the primary function of the BSBV?
The BSBV gives improved surge margin during engine start and transient operation. The bleed valve is controlled by the EEC and is fully modulating, between the fully open and the fully closed positions.
What position will the BSBV be in at engine start?
Fully open.
The BSVB has 2 actuators, how do they communicate their position to the EEC?
Only the left actuator interfaces with the EEC through a torque motor and is identified as the Master Actuator. The Master Actuator includes a LVDT, which transmits the actuator position and therefore the BSBV position to the EEC.
What is the primary function of the VSV?
Variable Stator Vanes control the entry of air into the H.P. compressor. The variable vanes control the angle at which the air enters the first three stages of the H.P. compressor. The actuator has an LVDT, which sends actuator positional information back to the EEC.
Which actuators provide the locking action for the Translating sleeve of the thrust reverser?
Lower actuators.
What would cause a Oil LOW PRESSURE ECAM warning?
The Oil LOW PRESSURE switch sends its discrete signal to the FWC to trigger the LOP warning, when the pressure drops below 60 PSI.
How are different Oil temperatures displayed on the ECAM?
Normal temperature is indicated green on ECAM, flashing green in Advisory mode if oil temperature gets too high (> 157 °C) , or steady amber if over temperature condition of 157 °C lasts more than 15 minutes. The indication becomes amber and a high oil temperature warning is triggered, if the oil temperature reaches 165 °C.
Where are the Magnetic chips installed on the engine?
Each scavenge line has a strainer and a magnetic chip detector to protect the pumps.
What wind speed restrictions would prevent safe opening of the fan Cowl doors?
Do not attempt to open the fan Cowl doors if the wind speed is higher than 96 Km/h (60MPH).
What flying control should be given special attention when opening the inboard thrust reverser “C” duct?
Do not open the inboard thrust reverser “C” duct if the wing leading edge slats are extended. Damage to the thrust reverser, wing leading edge slats and wing can occur.
