-
Equipment cooling provides cooling air for what compartment/systems?
- • Flight deck equipment
- • Electrical and equipment racks (E & E) Ø
FCOM, VOL 2; 2.20.16
-
When is warm equipment cooling air ducted overboard on the ground?
- • Engines not operating
- • Equipment cooling selector in NORM
- • Ambient temperature moderate or high (7C/45F)
FCOM, VOL 2; 2.20.16; 2.20.18
-
When does the equipment cooling system configure for flight?
• One or more engines on each wing is operating.
FCOM, VOL 2; 2.20.16
-
How can you manually configure the equipment cooling system for flight?
• Positioning the Equipment Cooling Selector to STBY.
FCOM, VOL 2; 2.20.16
-
Which valve is closed when equipment cooling is in closed loop mode?
• Inboard exhaust valve
FCOM, VOL 2; 2.20.16
-
What is the source of equipment cooling air for the flight deck?
• With two or three packs operating, the flight deck equipment cooling source valve directs conditioned air into the flight deck electrical equipment.
FCOM, VOL 2; 2.20.16
-
Describe the operation of the equipment cooling system with the Equipment Cooling Selector in OVRD.
- • Provides equipment cooling in flight if internal fans are inoperative.
- • Internal fans are not powered.
- • Smoke/override valve opens.
- • All other valves closed, no air flow to forward cargo.
- • Cabin differential pressure draws air from the panels area on the flight deck, through the equipment cooling ducts to the E&E, to create a reverse flow of air across the equipment, then through the supply duct, then overboard.
FCOM, VOL 2; 2.20.17; 2.20.18
-
Under what conditions would the equipment cooling system revert to closed loop mode?
- • LLCCAFR Selector in FWD LOW, BOTH LOW, FWD HIGH, with a forward lobe temp selector set lower than 10C (50F).
- • If a single internal fan fails.
- • When the MAIN CARGO FIRE ARM switch is pushed.
FCOM, VOL 2; 2.20.16; 8.10.4
|
|
