900 Pneumatics Flashcards
Wing anti-ice is divided into how many sections?
4
L/R FUSELAGE LOOPS
L/R WING LOOPS
How are the leading edges heated
Hot bleed air from the duct is released through piccolo tubes
What detects failures in wing anti-ice ducting
Dual loops
And
A skin temperature sensor in wing leading edge
Low and high pressure air come from what stages?
6th stage
10th stage
What’s manages the distribution of bleed air?
2 ACSCs (Air conditioning system controllers)
What does AILC (anti-ice and leak detection controller) do if a leak is detected?
Sends signal to close valves to isolate system
When do bleeds transfer from APU to the engines on take off if bleeds closed was needed for takeoff?
Landing gear up AND flaps 20 or less with the thrust levers out of the climb detent.
What monitors the bleed system for leaks
AILC anti-ice in leak detection controller
Pneumatically operated aircraft systems include:
Engine starting
Cowl and wing anti-ice
Air-conditioning and pressurization
The bleed air leak detection system monitors
The pneumatic and anti-ice ducting for high temperatures associated with the bleed air leakage
EICAS Messages and system control of the bleed air leak detection system is provided by
AILC
Engines supply high or low pressure bleed air depending on
The high pressure valve(HPV)
ACSC1 controls?
ACSC2 controls?
- Left HPV and left engine bleed valve
APU LCV
Isolation valve - Right HPV and right engine bleed valve
PRSOV Is shown in two places
ECS synoptic page
Anti-ice synoptic page
Engines supply high or low pressure bleed air depending on
The high pressure valve(HPV)
The bleed air manifold is divided into two sections by the?
Isolation valve
Bleed valves should fail in the ______ position.
Closed
APU LCV is fail safe in the _______ position.
Closed
Does manually selecting. The isolation valve open or closed override the systems protective features?
No
Where is the bleed air Manifold located
In the engine pylons and aft equipment bay
Divided into two sections by the isolation valve
Regarding the bleed air leak detection system how many dual sensing loops must detect a leak before a EICAS messages posted?
Both loops Must detect a leak before a message is posted
What is a APU interlock protection
It prevents APU from supplying air
If engine bleed source is open.
