AIR CONDITIONING Flashcards
- Equipment cooling is for the most part automatic. When would you have to interact with the system?
When the OFF light illuminates
- What does the Equipment Cooling OFF light
indicate?
Loss of air flow due to fan failure
- How many Supply fans are there? Exhaust
fans?
Two,two
- Where is equipment exhaust air drawn from?
Flight deck displays, overhead and AFT electronic panels, circuit breaker panels and E & E bay
- Where is equipment cooling air exhausted?
Overboardexhaustvalve(whenopen)
Outflow valve when OEV closed
- If a supply or exhaust fan should fail when on the ground, what indication would you get?
MC Light with an Overhead annunciation and a nosewheel well horn
- Is a single PACK capable of supplying all of the air conditioning and pressurization requirements of the airplane?
Yes
- What is indicated by a PACK light?
Pack trip (overheat) or dual controller failure
- When would you get HIGH flow if both packs were in AUTO?
Both engine bleeds off and APU bleed on
- If on downwind at 5 flaps and you had a pack to fault, would the remaining pack go to high
flow?
No, not with flaps out
- Is it recommended to operate two packs from a single bleed?
No
- When would it be feasible to operate two packs from a single bleed?
on the ground with the APU
- What sort of flow does the APU produce when
a pack is in HIGH on the ground?
Max rate
- What isindicated by a CONT CAB zone temp
light?
Duct temp overheat or dual controller failure
- What is indicated by a FWD CAB zone temp light?
Duct temp overheat
- What is indicated by a AFT CAB zone temp
light?
Duct temp overheat
- Can the AFT CAB zone temp light be reset?
Yes
- If both the primary and secondary controllers
for a pack fail, will the pack continue to operate?
Yes
- Why would the engineers design an air
conditioning system that is so seemingly difficult to understand?
To make it simple to operate
- When you move a zone temperature control
up, what are you asking the system to do?
Add warm trim (bleed) air
- What do recirculation fans do?
Reduce pack workload and bleed air demand (which saves fuel)
- How would you achieve maximum cooling on the ground?
Packs in auto, APU bleed open, & engine bleeds closed
- Which windows do the air vent controls defrost?
The # 1windows only
