Engines & APU Flashcards
In the normal mode, what does EEC use as controlling parameter for GE/PW engines?
GE: N1
PW: EPR
What protection features are provided in the EEC normal mode?
-Thrust limiting
-Maintains constant thrust
-Overspeed protection
What occurs with the Auto Throttle system when EEC control is switched to ALTN?
Auto throttle disconnects, but can be reconnected once all EEC’s are in ALTN
What EEC normal protection feature is not available in ALTN
Thrust limiting at max N1
When does EEC select approach idle?
-NAI on
-Flaps in Landing position
-Continuous IGN on
-thrust reverser operation (Maintained until 5 seconds after touchdown)
What happens when when you turn continuous IGN switch ON?
-selected igniters operate continuously
-commands approach idle minimum
What color does EGT change to if the EGT start or take off limit is reached?
RED
What 3 items will auto start system protect the engine from during an engine start that results in ENG 1,2,3,4 AUTOSTART?
-Hot Start
-Hung Start
-No EGT Rise
How is the engine thrust reverser actuated?
GE: Pneumatically actuated fan air
PW: Hydraulically actuated fan air
-8: Hydraulically actuated fan air
With an engine shutdown, what does X-BLD indicate besides N2?
Crossbleed air is recommended for in flight start (speed is too low for windmill start)
How many igniters selected for ground vs inflight start?
Ground: 1
In Flight: 2
-8 GENx2B67 engines command ice crystal anti icing when ice crystal icing conditions are detected at altitudes higher than _______ft. And continues for _____mins as long as ICI conditions are detected, or the aircraft descends below _______ft.
30000ft. 15 minutes. 28000ft.
When does -8 GENX2B67 select approach idle?
-NAI ON
-Thrust reverser operation
-Flaps in Landing position
-Flaps 20 selected (as opposed to CON IGN selected ON in 400)
Under what condition on the ground will GEN X EEC shutdown an engine to provide protection against thrust asymmetry due to an control malfunction?
-Thrust lever at/near IDLE AND
-Engine above command N1 and not decelerating normally
GEN X engine inflight start attempt will increase EGT limit by 25degrees after 4 start attempts and will repeat this action on subsequent restart attempts until:
-Start is achieved OR
-EGT limit is reached
