Air Conditioning Flashcards
What are the 4 zones that air temperature can be controlled?
Flight Deck
FWD
Mid
AFT
What bus are the recirculation fans on?
Utility Bus
What recirculation fan works with the Left Pack
Forward
(Aft with Right Pack)
How much extra fuel does an individual pack burn if running in High Flow?
0.3% of total fuel burn
With both engines running, When does a pack go to High flow?
Partner fan fail
With both engines running, What is the relationship between L and R packs if one pack fails?
Remaining pack goes to high flow
What is the relationship between L and R packs if one pack fails?
Remaining pack goes to high flow
What happens to the remaining pack when operating with an engine shut down?
With only 1 engine running the remaining pack is inhibited from going in to High Flow
Air conditioning panel INOP lights are caused by what?
Indicator that individual zone control valve has experienced a fault
Recirc fan INOP light means what?
Fan not working. Refer to logic for why.
How many pack controllers does each pack have?
2 AUTO and STBY
The cargo area is heated to what temperature with?
Approximately 45 degrees F
Which duct supplies air to the cargo compartments?
Aft/bulk cargo come from body duct
Forward cargo comes from centre duct
Which bus supplies power to the Recirc fans?
Utility bus
If carrying live animals, what do we do?
Bulk cargo heat selected to VENT to raise temperature to 65 using additional cabin temperature
If normal system works correctly when does the heat control valve protection close?
90 degrees
When do the cargo control valves work?
Heat control Valve closes when temperature rises to 90 degrees
Shutoff control valve closes when temperature drops below 45 degrees
With both engines running, When does a pack go to High flow?
Partner fan fail
With both engines running, What is the relationship between L and R packs if one pack fails?
Remaining pack goes to high flow
What happens to the remaining pack when operating with an engine shut down?
With only 1 engine running the remaining pack is inhibited from going in to High Flow
The R bleed air system supplies duct air to where?
R Pack
R Wing Anti-Ice
R HYD Res
The Body duct bleed air system supplies duct air to where?
ADP
Aft Cargo Heat
Bulk Cargo Heat
C HYD Res
The L bleed air system supplies duct air to where?
L Wing Anti Ice
L HYD Res
What are the possible reasons are there for the Pack INOP light?
Air too hot
Fault in the controller system
What does a pack off light illuminated mean?
Pack valve closed
