Pneumatics Flashcards
What systems use 10th stage bleed air?
- engine starts
- air conditioning
- equipment cooling (avionics)
- pressurization
Name all possible sources of air for the 10th stage bleed air system
- each engine
- APU
- ground power cart
Do the 10th stage bleed SOVs fail-safe open or closed?
close
How is 10th stage bleed SOVs controlled and operated?
electrically controlled and pneumatically operated
What is the function of an isolation valve?
- crossover engine starts
- APU engine starts
- ground air supply starts
- crossover air conditioning
What is the purpose of the APU load control valve?
- modulate valve for load
- allow APU air into the 10th stage bleed air manifold
- interlock protection
What system use 14th stage bleed air?
thrust reversers, anti-icing on wing leading edge, T2 probes, engine inlets
Do the 14th stage bleed SOVs fail-safe open or closed?
opne
How many overheat detection loops on the 14th stage bleed system?
single
How many overheat detection loops on the 10th stage bleed system?
dual
During engine start, what is the position of the 10th stage bleed air valve?
open
If landing with the anti-ice system on, what will happen upon touchdown?
An anti-ice disable feature that will automatically disable wing and cowl anti-ice upon deployment to allow maximum 14th stage air to the reverser
If anti-ice is required for takeoff, what system must be selected off?
the bleed air 10th stage valves
