Set transponder to 7700 if no contact with ATC.
PAX OXY MASK Switch ......................................................... EJECT
Level off Altitude.............................................................. SET & ARM
Level off altitude should be a maximum of 14,000 feet or MEA, whichever is higher.
Altimeters....................................................................................... SET
PA ..................................................... ADVISE F/A’S OF SITUATION
- - - - - AFTER LEVEL OFF - - - - -
Speed brakes ..................................................................RETRACTED
Crew Oxygen Regulators ............................................ AS REQUIRED
Flight crew must use oxygen when cabin altitude is above 10,000 feet. To conserve oxygen, position NORMAL/100% selector to NORMAL.
PA .................. ADVISE F/A’S OXYGEN NO LONGER REQUIRED
* * * *
LOSS OF PRESSURIZATION / RAPID
DECOMPRESSION / EMERGENCY
DESCENT EXPANDED CHECKLIST
A rapid loss of cabin pressure, or control of pressurization at flight altitudes above 14,000 feet MSL can quickly lead to a situation requiring an immediate descent to a safe cabin altitude. Indications of a pressurization problem: pressure changes sensed by the pilots ears, FLOW light on, climb rate on cabin climb gauge, and increasing cab alt pointer/decreasing diff press pointer. The CABIN ALT light, 5 second warning horn, and MASTER WARNING lights will alert the flight crew when the cabin altitude exceeds 10,000 feet. On some aircraft, a voice warning will alternate with the warning horn.
IMMEDIATE ACTION
Oxygen Masks, Regulators.....................................................ON, 100% Crew Communications ................................................. ESTABLISHED Check BOOM / MASK switch to MASK. Use RADIO / INT switch or select INT on audio control panel and use control wheel mic switch to establish cockpit communications. Turn cockpit speakers volume up as required. VHF-1 must be selected to talk to ATC. PA’s may be made with the NORMAL / MASK PA switch. NO SMOK, SEAT BELTS Switches................................................. ON The AUTO feature (if selected) should turn these signs on if the cabin pressure exceeds 10,000 feet. These switches will be set to ON to assure passengers are seated and smoking materials are extinguished prior to oxygen use.
SECONDARY ACTION
PNF accomplish or verify and advise when completed:
CABIN ALT Control
Lever, Wheel..................................................................LOCKED DOWN, FULL FORWARD
Place the cabin altitude controller lever in manual (down) position. Depress and rotate the cabin altitude control wheel forward. Release the wheel when the indicator is at full forward (valve close) position.
Note: Manual control forces may be high. Apply force as required.
(Continued)
PNEU X-FEED VALVE Levers ...............................................CLOSE
This action will minimize the amount of ducting that is pressurized.
AIR CONDITIONING SUPPLY Switches.................................AUTO
Provides more pneumatic pressure than HP BLD OFF position.
RADIO RACK Switch ...................................................................FAN
Less pneumatic pressure required than VENTURI position.
Cabin Altitude Is Below 14,000 Feet and Controllable:
CABIN ALT Control Lever, Wheel..................... AS REQUIRED
Return cabin pressure to that appropriate for flight altitude. If system is borderline, descend as necessary to maintain cabin altitude below 14,000 feet.
* * * *
Cabin Altitude Is At Or Above 14,000 Feet Or Not Controllable: Perform an emergency descent. Advise F/A’s as soon as possible.
Throttles ..........................................................................CLOSED
Note: Autopilot and autothrottles may be used for emergency descent.
Speedbrakes ....................................................................EXTEND
Extend speed brakes fully.
Structural Integrity.................................................DETERMINE
It may be difficult, or impossible, to accurately determine the structural condition of the aircraft. Definite indications of structural compromise include explosion, cargo door light on, and cabin door or window failure.
Descent Speed............................................................ESTABLISH
No Structural Damage/No Turbulence:..80-.82M/320-340 KIAS Structural Damage or Turbulence: .75-.79M/275-285 KIAS
(Continued)
ATC .................................................................................. ADVISE
The PNF will advise ATC of the emergency and the beginning of the emergency descent. It is not necessary to delay descent until receiving clearance from ATC. Set transponder to 7700 if no contact with ATC. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：MD-80 Flight Manual 麦道80飞行手册 1(41)
