Pneumatics Flashcards
The APU provides bleed air up to what altitude?
20,000’
The bleed air ducts are constructed of what material(s)?
Stainless Steel
Titanium
Aluminum
High Pressure bleed air is routed through HP valves to …
Wing Anti-Ice System
Intermediate Pressure bleed air is routed through IP valves to …
To the common manifold where the ECS system controls it
The bleed air manifold is located …
In the engine pylons and aft equipment bay
Both the APU and ground air cart supply air to what side of the cross bleed valve?
Right Side
The IP valves are controlled by and operated by …
Electrically controlled by the L/R BLEED switches on the panel and pneumatically operated
The pressure regulating function of the IP valve limits engine discharge pressure to …
50 +- 3
L/R BLEED AIR caution occurs when …
IP valve fails and manifold pressure exceeds 60 psi
The IP valves are in a closed position when any occurs … (5)
Engine Shut Down
Power lost to the valves
ENG FIRE switch selected
Valves selected closed on the AIR COND/BLEED panel
During Engine start
The HP valves regulate engine high pressure bleed to …
36 +- 3 psi
The HP valves are controlled by and operated by …
WING SOURCE and WING switch electrically control the pneumatically operated valves
The HP valves are closed when any of the following occur … (4)
Engines Shut Down
Power lost to valves
ENG FIRE switch selected
WING anti-ice selected OFF
The APU bleed valve is controlled by …
The APU ECU (electrical control unit)
The amount of bleed air taken from the APU depends on …
APU exhaust temperature as determined by the ECU
