KLM MD-11 - Passenger Aircraft Cabin Doors; Cockpit Door; Clearview Windows; Inadvertent Cabin Door In-Flight Pneumatic Discharge

MD-11 Flight Crew Operations Manual
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Emergency Equipment -
Description and Operation
Emer.10.5
Passenger Aircraft Cabin Doors
There are eight main cabin doors, four on each side of the aircraft. From outside
the aircraft the operating handles are identical and all are opened in the same
manner in the event of an emergency. From inside the aircraft the six aft doors
have identical handles and identical emergency opening procedures. The two
forward cabin door handles however, are not identical to the aft six and are
operated differently. Power for the emergency opening of all cabin doors is
pneumatic. An air reservoir and a pressure indicator are installed at each door. If
the emergency door opening procedure is performed from inside the aircraft with
emergency pneumatic power, the associated escape slide will deploy
automatically. When using emergency pneumatic power to open the doors from
the inside, slide deployment can be prevented by holding the slide arming lever in
the emergency interlock override position. A manual lift bar is installed on the
cabin doors to allow opening of the doors from inside the aircraft when pneumatic
power is not available. The manual lift bar can only be used with the door handle
in the emergency position. At least two people may be required to open a door by
the manual lift method.
Cockpit Door
The cockpit door allows access to the main cabin from the cockpit. In the event
the door is jammed, a blowout panel on the lower half can be unhinged or kicked
open. This provides an adequate crawl-through opening to the main cabin and the
normal evacuation routes.
Clearview Windows
Two sliding clearview windows provide an alternate escape route for the flight
crew. The clearview windows are adjacent to the windshields. Escape lines are
installed to allow the crew to lower themselves to the ground.
Inadvertent Cabin Door In-flight Pneumatic Discharge
Refer to the illustration for procedures.
NOTE: Inadvertent actuation of a cabin door control handle, to
Emergency (pneumatic) Open position, in flight will discharge the
corresponding door pneumatic bottle. Discharging the bottle will
not open the door in flight unless cabin differential pressure is less
than approximately 0.55 psi. Cabin differential pressure above
approximately 0.55 psi will keep door closed. With door closed,
pneumatic bottle pressure will bleed off within a few seconds,
leaving no residual that could force door open even if cabin
differential pressure is relieved.
October 02, 2006