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Mechanical Engineering
Boeing 777 FCOM 2 Air Systems
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How many separate temperature control zones are there in the Air Conditioning System?
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Seven: The flight deck and six passenger Cabin zones.
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How many separate temperature control zones are there in the Air Conditioning System?
Seven: The flight deck and six passenger Cabin zones.
What are the possible bleed air sources?
Engines, APU, High-pressure air from a ground source.
Name the 9 major systems that use bleed air from the Bleed Air Duct:
1. Air Conditioning Packs.
2. Air Driven Hydraulic Pumps.
3. Aft Cargo Heating.
4. Engine and APU starting.
5. Hydraulic Reservoir Pressurization.
6. Potable Water Pressurization.
7. Trim Air.
8. Wing and Engine Anti Ice.
9. TAT Probe aspiration.
Bleed Air from the APU may be used up what altitude?
Approximately 22,000 ft.
Engine bleed air normally comes from the Low Pressure (LP) Section. When is bleed air sourced from the High Pressure (HP) Section?
During low thrust settings, e.g. during descent and taxi.
