B747 Air Systems
When does the equipment cooling system configure for flight - Answer- One or more engines on each wing is operating
On the ground, when is warm equipment cooling air ducted overboard - Answer- Engines not operating
Equipment cooling selector in NORM
Ambient temperature mod...
B747 Air Systems
When does the equipment cooling system configure for flight - Answer- One or more
engines on each wing is operating
On the ground, when is warm equipment cooling air ducted overboard - Answer-
Engines not operating
Equipment cooling selector in NORM
Ambient temperature moderate or high
Equipment cooling provides cooling air for what compartment and systems - Answer-
Flight deck equipment
Electrical and equipment racks (E&E)
How can you manually configure the equipment cooling system for flight - Answer-
Positioning the Equipment Cooling Selector to STBY
What is the function of the LOWER LOBE CONDITIONED AIR FLOW RATE selector
- Answer- Provides FWD and AFT cargo lobe conditioned air
What happens if a pack temperature controller (PTC) detects a fault in a pack
channel - Answer- Control of the respective pack switches to the other PTC
How many pack temperature controllers (PTC) are provided - Answer- Two - A and
B
On on 747-8 with main deck and FWD/AFT lower lobe temperature selector in the
OFF position, what is the temperature zone target? - Answer- 68F/20C
747-8, the Nitrogen Generation System converts bleed air to nitrogen enriched air for
what purpose - Answer- Reduce flammability of center wing tank fuel
On the 747-8, what does the alternate ventilation system provide with pack 1+2+3
shutdown and the airplane depressurized - Answer- Outside air to the flight deck
On the 747-8, what position are the MAIN DECK FWD and AFT TEMP selectors
normally placed in during preflight - Answer- OFF
On the 747-8, what position is the LOWER LOBE AFT CARGO HT selectors
normally placed in during preflight - Answer- LOW
On the 747-8, the TEMP DEV CGO advisory message HI or LO respectively indicate
- Answer- HI: 9F (5C) higher than selected temperature
LO: 9F (5C) lower than selected temperature
The 747-8 Lower Lobe Aft Cargo Heat Selector regulates temperature control valve
to maintain at least ____F/_____C in LOW position and _____F/_____C in HIGH
position - Answer- 40F/4C
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