Air Systems Flashcards
Recirculation fans _____ and allow packs to operate at a reduced flow.
improve cabin ventilation
The left pack supplies air to the cockpit at a higher pressure than the passenger cabin _____.
to prevent smoke from entering the cockpit from the passenger cabin
Shoulder and foot heat for pilots is available _____.
in flight only
The AIR COND reset switch resets or attempts to reset which of the following?
Pack valves, trim air valves, recirculation fans, and fault protection.
When the engine bleed air switches are selected ON, an engine bleed valve closes automatically for _____?
a bleed air duct leak
If an automatic shutdown of the cargo heat system occurs, cargo heat _____.
to the related compartment cannot be restored in flight.
Pneumatic system air can be supplied by the ______.
engines, APU, or ground air source
If a duct leak is detected, the appropriate valves ____ to isolate the leak.
close automatically
In flight, APU bleed air is available for pressurization at or ____ feet.
below 22,000
The LDG ALT (landing altitude) display shows ______.
when half way or more than 400 NM from departure airport
For ground operations, single air conditioning pack operation is not recommended:
because it does not reduce APU fuel consumption
If the EQUIP COOLING OVRD light is illuminated and AUTO is visible, the ______.
smoke override mode has been automatically selected
For _____, pack control automatically uses standby cooling as a backup mode. The EICAS advisory message PACK MODE (L,R) displays
certain internal malfunctions
When pulled ON, the LDG ALT selector removes the FMC landing altitude. Rotating left or right manually sets the landing altitude. Pushing the selector in _____.
restores the FMC landing altitude.
The ____ cargo compartments are heated and pressurized.
forward, aft, and bulk
