Engine, APU Flashcards
When is the APU in the UNATTENDED mode?
When neither engine is running or starting
While in the unattended mode the APU will shut down for which faults?
F.O.C.S. H.E.L. G.I.N.N.
*Fire/inlet over temperature
*Overspeed/loss of overspeed protection
*Controller failure
*Speed droop
*High oil temperature
*EGT high
*High oil pressure
*Generator oil filter approaching bypass
*intake door failure
*No combustion on start *No acceleration on start
When is the APU in ATTENDED mode?
When either engine is running or starting, or when the airplane is in flight
Which faults cause the APU to shut down while in the ATTENDED mode (with no cool down period) and the EICAS message APU SHUTDOWN displayed?
F.O.C.S.
*Fire/inlet over temperature
*Overspeed/loss of overspeed protection
*Controller failure
“Speed droop
While in the ATTENDED mode, what failure are indicated but the APU will not shut down automatically?
EICAS message: APU LIMIT
H.E.L. (I have to shut it down myself)
*High oil tempature
*EGT high
*Low oil pressure