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MANUAL.
AIR SYSTEMS
737 Sec. 6.2 Page 31
Flight Manual Continental Rev. 11/15/02 #41
? DUCT OVERHEAT Light (amber)
Illuminated – Indicates passenger cabin duct overheat.
· Air mix valves drive full cold.
· Requires reset.
@ Flight Deck Temperature Selector
A Passenger Cabin Temperature Selector
AUTO – Automatic temperature controller controls passenger cabin
temperature as selected.
· Controlled through temperature sensor located in cabin ceiling and
controller located in electronic equipment bay.
MANUAL – Air mix valves controlled manually.
· Automatic temperature controller bypassed.
B RAM DOOR FULL OPEN Light (blue)
Illuminated – Indicates ram door in full open position.
AIR SYSTEMS
Sec. 6.2 Page 32 737
Rev. 11/15/02 #41 Continental Flight Manual
>>@B BLEED AIR CONTROLS
< ISOLATION VALVE Switch
CLOSE – Closes the isolation valve.
AUTO – Closes the isolation valve if all engine bleed air and air conditioning
pack switches are ON.
· Opens the isolation valve automatically if either engine bleed air or air
conditioning pack switch is positioned OFF.
OPEN – Opens the isolation valve.
= Wing-Body Overheat Test Switch
PRESS – Tests the wing-body overheat detector circuits.
· Both WING-BODY OVERHEAT lights illuminate.
> TRIP RESET Switch
PRESS – If the fault condition has been corrected, resets BLEED TRIP OFF,
PACK TRIP OFF and DUCT OVERHEAT. Lights remain illuminated until reset.
AIR SYSTEMS
737 Sec. 6.2 Page 33
Flight Manual Continental Rev. 11/15/02 #41
? Engine Bleed Air Switch
OFF – Closes the engine bleed air valve.
ON – Opens the engine bleed air valves when the engine is operating.
@ APU BLEED Air Switch
OFF – Closes the APU bleed air valve.
ON – Opens the APU bleed air valve if the APU is operating.
AIR SYSTEMS
Sec. 6.2 Page 34 737
Rev. 11/15/02 #41 Continental Flight Manual
AIR CONDITIONING CONTROLS
>>@B Forward Overhead Panels
< Recirculation Fan Switch
AUTO – Fan is signaled on except when both packs are operating with either
pack switch in HIGH.
= Air Conditioning Pack Switch
AUTO – With both packs operating, each pack regulates to low flow rate.
· With only one pack operating, regulates to high flow rate when inflight
with flaps up.
HIGH – Pack regulates to high flow.
· Recirc fan signaled off when both packs are operating.
· Provides maximum flow rate on ground with APU bleed air switch ON.
> PACK TRIP OFF Light (amber)
Illuminated – Indicates pack trip off. Pack valve automatically closes and
mix valves drive full cold. Trips are caused by pack temperatures
exceeding limits.
? TRIP RESET Switch
PRESS – If the fault condition has been corrected, reset BLEED TRIP OFF,
PACK TRIP OFF and DUCT OVERHEAT lights. Lights remain illuminated until
reset.
AIR SYSTEMS
737 Sec. 6.2 Page 35
Flight Manual Continental Rev. 11/15/02 #41
CD Forward Overhead Panel
< AIR Temperature (TEMP) Source Selector
SUPPLY DUCT – Selects appropriate zone supply duct temperature.
PASS CAB – Selects forward or aft passenger cabin temperature.
PACK – Selects left or right pack temperature.
AIR SYSTEMS
Sec. 6.2 Page 36 737
Rev. 11/15/02 #41 Continental Flight Manual
= ZONE TEMP Lights
Illuminated (amber):
· CONT CAB indicates a duct temperature overheat or failure of the flight
deck primary and standby temperature control.
· FWD CAB or AFT CAB indicates duct temperature overheat.
During Master Caution light recall:
· CONT CAB indicates failure of the flight deck primary or standby
temperature control.
· Either FWD CAB or AFT CAB indicates failure of the associated zone
temperature control.
· Lights will extinguish when Master Caution is reset.
> Temperature Selector
AUTO – Provides automatic temperature control for the associated zones.
Rotating the control toward C (cool) or W (warm) manually sets the desired
temperature.
OFF – Closes the associated trim air-modulating valve.
? RAM DOOR FULL OPEN Light
Illuminated (blue) – Indicates ram door in full open position.
@ Air Conditioning PACK Switch
OFF – Pack signaled OFF.
AUTO –
· With both packs operating, each pack regulates to low flow.
· With one pack operating, operating pack regulates to high flow in
flight with flaps up.
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737 FLIGHT MANUAL 737飞行手册3(57)
