Pneumatics Flashcards
The AMS automatically controls which of the following?
Bleed control,
air conditioning control,
hot air leak detection,
crew O2 monitoring,
wing/engine ice protection
The AMS controller is a _______ channel controller.
dual
True or False: During normal operations, the left engine would supply bleed air Pack 1 while the right engine would supply bleed air to Pack 2.
True
True or False: During high power settings, bleed air is usually supplied by the low stage port.
True
Engine bleed air is provided by _______ compressor ports on each engine.
2
[6th and 10th]
What determines when the high pressure bleed port opens and closes?
AMS controller
The engine bleed valve located in the _______ regulates pressure from the engine bleed system.
nacelle
True or False: Engine fan air can be used on the ground to cool the hot bleed air when sufficient RAM air is not available.
True
Prior to entering the bleed supply lines, bleed air temperature is cooled by
_______.
Pre-cooler
The BLEED 1 button controls the bleed air for_______.
Engine 1
True or False: The APU can only be used for bleed air while on the ground.
False
Bleed air from the APU may be used for which of the following?
Air conditioning and pressurization up to 15,000 ft,
and engine starting up to 21,000 ft
The XBLEED valve allows:
Bleed air from one side of the system to be directed to the other side of the system
True or False: The aircraft has separate external pneumatic ground ports for
engine starting and pre-conditioned air.
True
The APU can be used as a source of bleed air for which of the following?
Air conditioning and pressurization on the ground and up to 15,000 ft,
and engine starting up to 21,000 ft
True or False: The XBLEED open/close auto-logic is handled by the AMS
controller as long as the XBLEED switch on the overhead panel is selected OUT
(black and white striped advisory light in the switch is illuminated).
False
[IN for AUTO]
True or False: The engine or APU bleed switches on the AIR COND/PNEUMATIC
panel will illuminate a red crosshatch in the top half of the switch if the ODS
detects a bleed leak.
False
(Amber striped bar 2.2 Vol 1)
Which of the following areas is NOT monitored by the Overheat Detection System
(ODS)?
- NOT THE MAIN WHEEL WELL AREA - -
Entire pneumatic system ducts are monitored:
Engines
APU
Anti-Ice bleed ducts
Packs
True or False: Engine bleed air is supplied from the 2nd and 4th stage bleed ports.
False
[6th and 10th]
True or False: With both ODS loops operational, both loops must detect a bleed air leak before an EICAS message is displayed.
True
If one channel of the AMS controller fails, which of the following occurs?
Control automatically transfers to the other channel without interruption
With accompanying EICAS (cyan) fault message
