Air Conditioning Flashcards
T/F: You should not operate both AC packs from one engine
True
When are the ram air inlet doors fully open?
On the ground or in flight with the flaps fully extended.
When the PACK switches are in the AUTO position, when will a pack automatically go to high flow?
- With one pack operating in flight with the flaps retracted.
- Both engine BLEED air switches are OFF, and the APU BLEED air switch is ON
The SUPPLY DUCT position of the AIR TEMP Selector indicates the temperature of the ____
Air in the main distribution duct
T/F: Cargo heat is controlled from the flight deck?
False
The purpose of the recirculation fan is ?
Reduce pack demand for bleed air
When does the OFF light on the EQUIP COOLING panel illuminate?
When there is not sufficient cooling airflow in the E&E bay (selecting the alternate fan should restore airflow and extinguish the OFF light within five seconds).
Where is the warm E&E Bay air routed when the overboard exhaust valve is closed?
Forward cargo compartment
When is the overboard exhaust valve normally open?
On the ground, or in flight when there is low cabin differential pressure
Some of the conditioned air exiting the _____ pack flows to the flight deck where it is used for heating and cooling
left
A single pack is capable of maintaining pressurization and acceptable temperatures throughout the airplane up to _______________
41,000 feet
In the AUTO position with both packs operating, each pack regulates to ______ flow
low
In order to reduce the demand on the engine and ensure adequate engine power for single engine operation, automatic switching to high flow is inhibited when:
- On the ground
- In flight with flaps fully extended
The PACK TRIP OFF light illuminates to indicate that ____________ has exceeded its limits.
pack temperature
Normally, the flight deck air supply comes directly (no recirculated cabin air) from the __________________
left air conditioning pack
The Equipment cooling system consists of a _____ duct and a _______ duct; each of which has ______ fans
supply, exhaust, 2
What automatically happens when the PACK TRIP OFF light illuminates?
The corresponding pack valve closes and the mix valve(s) drive to the full cold position. (The TRIP RESET switch must be pushed after the temp has been reduced to extinguish the light)
Ram air inlet doors are automatically controlled by the respective pack to provide cool ram air for what?
The Heat Exchangers
When does the OFF light on the Equipment Cooling Panel illuminate?
When no airflow (via low flow detectors) is detected from the respective cooling fan (Supply or Exhaust). Switching the fan switch to ALTN should extinguish the light
In addition to controlling the quantity of equipment cooling exhaust air, the Overboard Exhaust Valve also does what?
Assists with smoke removal
On the ground, the Overboard Exhaust Valve is in what position?
fully open
