Engine Bleed Air Flashcards
1
Q
What would cause a system fault light to illuminate?
A
- bleed air overheat
- bleed air overpressure
- HP bleed or PRV valves open when commanded closed
2
Q
What valves are closed when you place the engine bleed air switch to OFF?
A
- engine bleed air valve
- PRV
- HP bleed air valve
3
Q
Do you still have NAI and trust reversing with the engine bleed air switch OFF?
A
yes, unless the PRV is commanded closed by start valve open, bleed air overheat, or HP valve failed open
4
Q
Bleed Duct Leak L: How many switches will be involved?
A
5 or 6:
- left isolation valve
- engine bleed switch 1 & 2
- # 1 pack control selector
- # 1 demand pump switch
- WAI switch if in use
5
Q
Bleed Duct Leak L: What should be considered when configuring the airplane?
A
- Left LE will operate in secondary mode (“Flaps Primary” followed by “Flaps Drive” EICAS message until fully extended or retracted)
- slight asymmetry until fully extended or retracted
6
Q
Bleed Duct Leak L: What should be considered if aircraft has to be towed in?
A
Leave #1 engine running for hydraulics for steering