Air Systems Flashcards
When does the Equipment Cooling configure for flight?
With one or more engines on each wing operating.
On the ground, when is warm equipment cooling air ducted overboard? (3 Items)
Engines not Operating,
Equipment Cooling Selector in ‘NORM’, and
Warm ambient temperatures.
Equipment Cooling provides cooling air for what systems? (2 Items).
Flight Deck Instruments, and
Electronics and Equipment Racks.
How can you manually configure the Equipment Cooling system for flight?
Positioning the Equipment Cooling Selector to ‘STBY’.
What is the function of the Lower Lobe Cargo Conditioned Air Flow Rate Selector knob?
To provide airflow and conditioned air to the lower cargo lobes.
What happens when a fault is detected in a Pack Temperature Controller (PTC)?
Control of the respective pack(s) revert to the operational PTC.
How many PTC’s are there?
- A & B.
On the 747-8, with the Main Deck and FWD & AFT lower lobe temperature selectors set to ‘OFF’ what is the temperature zone target?
20 deg C (68 deg F).
On the 747-8, the Nitrogen Generation System (NGS) converts engine Bleed Air to Nitrogen Enriched Air for what purpose?
To reduce the flammability of fuel in the CWT.
On the 747-8, what is the purpose of the Alternate Ventilation system when all packs are off, and the aircraft is depressurized?
To provide ambient airflow to the flight Deck.
On the 747-8, what position are the ‘MAIN DECK FWD & AFT’ temperature selector switches normally placed in during preflight?
OFF.
On the 747-8, unless required, what position is the Lower Lobe Cargo Conditioned Air Flow Rate Selector switch placed in during preflight?
LOW.
On the 747-8, the ‘TEMP DEV CARGO LO (HI)’ EICAS Message indicates what?
Temperature deviations of +/- 5°C (9°F).
On the 747-8, what temperature in the LO and HI position will the Lower Lobe AFT CARGO HEAT maintain?
LO = 4°C (40°F).
HI = 10°C (50°F).
The 747-8 ECS Left & Right Trim Air provides airflow to which zones?
Left = Flight Deck, Upper Deck, Crew Rest, AFT Main Deck.
Right = FWD Main Deck, FWD LL, AFT LL.