737 Operations Manual
Non-Normal Checklists -
Air Systems
Copyright © The Boeing Company. See title page for details.
NNC.2.4 D6-27370-400E-TBCE
EMERGENCY DESCENT
Condition: Unable to control cabin pressure with airplane above
14,000 feet MSL or conditions require a rapid descent.
EMERGENCY DESCENT . . . . . . . . . . . . . . . . . . . . ANNOUNCE
The captain will advise the cabin crew, on the PA system,
of impending rapid descent. First officer will advise ATC
and obtain the area altimeter setting.
ENGINE START SWITCHES. . . . . . . . . . . . . . . . . . . . . . . . . .ON
THRUST LEVERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CLOSE
Reduce thrust to minimum or as required for anti-ice.
SPEED BRAKE . . . . . . . . . . . . . . . . . . . . . . . . FLIGHT DETENT
DESCENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INITIATE
TARGET SPEED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mmo/Vmo
If structural integrity is in doubt, limit speed as much as
possible and avoid high maneuvering loads.
LEVEL-OFF ALTITUDE. . . . . . . . . . LOWEST SAFE ALTITUDE
OR 10,000 FT,
whichever is higher
SPEED BRAKE . . . . . . . . . . . . . . . . . . . . . . . . . DOWN DETENT
Smoothly lower the SPEED BRAKE lever and level off.
Add thrust and stabilize on altitude at desired airspeed.
CREW OXYGEN REGULATORS . . . . . . . . . . . . . . . . .NORMAL
Flight crew must use oxygen when cabin altitude is
above 10,000 feet. To conserve oxygen, position the
NORMAL/100% selector to NORMAL.
ENGINE START SWITCHES. . . . . . . . . . . . . . . . AS REQUIRED
The new course of action is based on weather, oxygen, fuel
remaining and available airports. Use of long range cruise
may be appropriate.
June 08, 2001
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