Powerplant Flashcards
When might a manual start be considered?
If an automatic start aborts due to low starter inlet air pressure.
If the #1 ENG MAN START pushbutton is depressed, will the engine begin to motor?
No, the ENG MODE selector must be set to either CRANK or IGN/START.
During a manual start of the #1 engine, does the ENG MAN START pushbutton have to be depressed
to close the start valve?
No, the start valve closes automatically when N2 greater than or equal to 50%.
What are the five positions of the thrust levers?
TOGA, FLEX/MCT, CL, IDLE, MAX REV.
How is the Autothrust usually armed on the ground?
By setting the thrust levers at the FLX or TOGA detent when the engines are running.
How is Autothrust usually activated?
By selecting the Thrust Levers to the CL detent.
How is activation of Autothrust confirmed?
A/THR is displayed in white in column five of the FMA.
What is Thrust Lock?
The Thrust Lock function prevents thrust variations when the A/THR fails/disconnects.
What is Alpha Floor?
A protection that commands TOGA thrust regardless of thrust lever position.
What is TOGA Lock?
After the aircraft leaves Alpha Floor conditions, TOGA thrust is frozen and thrust lever movement
has no effect until Autothrust is disconnected.
What happens if the instinctive disconnect pushbuttons are pushed and held (15sec.)?
The autothrust system is disconnected for the remainder of the flight, including Alpha Floor
protection.
What does the FAULT indication on the ENG panel mean?
Automatic start abort, or a fuel valve disagreement.
With the ENGINE MODE switch in NORM, when will ignition be provided?
Flame out and EIU failure (CFM). Flame out, EIU failure, slats extended and engine anti-ice on. (IAE)
What does the FADEC control?
The Full Authority Digital Engine Control (FADEC) controls start sequencing, fuel metering, and
engine limits.
What happens if one FADEC fails?
The FADEC is dual channel so the other channel will provide full authority for all engine functions.
