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 F.  The equipment compartment exterior doors consist of the auxiliary power unit access doors, air conditioning access doors and the forward and center electronic equipment access doors. The auxiliary power unit access doors, located in the extreme aft lower surface of the fuselage, are outward-opening, hinged, clamshell doors operable from outside the airplane. The air conditioning access doors, located beneath the wing center section, are outward-opening hinged doors secured by either latches or fasteners. The air conditioning access doors are operable from outside the airplane. The forward electronic equipment access door, located on the left side of lower fuselage aft of the nose wheel well, is an inward-opening, plug-type sliding door operable from either inside or outside the airplane. The center electronic equipment access door, located on the centerline of lower fuselage aft of the forward electronic equipment access door, is an inward-opening, plug-type hinged door operable from the outside of the airplane.
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A
747-400
MAINTENANCE MANUAL

MAIN ENTRY DOOR ACCESS PANEL (2 LOCATIONS)
MAIN ENTRY DOOR (2 DOORS, LEFT SIDE ONLY)
SIDE CARGO DOOR
CREW COMPARTMENT OVERHEAD HATCH
OIL FILLER ACCESS DOOR (4 LOCATIONS)
NOSE CARGO DOOR
EXTERIOR POWER
RECEPTACLEAIR CONDITIONING
UPPER DECK ACCESS PANELS FORWARD CARGO
CREW SERVICE AND DOORS DOOR CONTROL
DOOR SWITCH ACCESS
AFT CARGO DOOR FORWARD
CONTROL SWITCH CARGO
ACCESS DOOR
NOSE GEAR
DOORS FORWARD ELECTRONICS ACCESS DOOR
AFT CARGO FORWARD LAVATORYDOOR SERVICE DOORBULK CARGO DOOR CENTER ELECTRONICS ACCESS DOOR
FORWARD POTABLE WATER BODY GEAR
SERVICE ACCESS DOOR DOORS
AUXILIARY WING GEAR
POWER UNIT DOORS

GROUND AIRACCESS DOORS CONDITIONING ACCESS DOOR AUXILIARY
POWER UNIT ACTUATORBATTERY ACCESS DOORACCESS DOOR
Door Locations
Figure 1

C72040
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747-400
MAINTENANCE MANUAL

 G.  The exterior service doors, which provide access for servicing the various airplane systems are generally small, outward-opening hinged doors operable from outside the airplane. The exterior service doors include the following:
 (1)
External Power Receptacle Door

 (2)
Vacuum Flush System Lavatory Service Door

 (3)
Potable Water Service Doors (2)

 (4)
APU Battery Access Door

 H.  
The flight compartment interior door is located at the aft end of the flight compartment. The door can be opened manually from the flight compartment or with a key from the upper deck passenger compartment. An electric latch mechanism allows remote release of the door from the flight compartment.

 I.  
All exterior doors are fitted with periphery seals to prevent air pressurization loss and/or internal rain leakage.

 J.  
An electrical door warning system provides the crew with visual warning if certain doors are open or improperly latched.

 K.  
The entry and cargo doors may be operated or left open in winds up to 65 knots without structural damage. The doors are designed for powered operation in winds up to 40 knots. Above 40 knots, the drive systems may stall or latches may not perfectly align, depending on wind and airplane conditions.

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A
747-400 MAINTENANCE MANUAL
 DOOR SEALS - REPAIRS
____________________
 1.  General_______
 A.  This procedure contains instructions to repair the pressure seals on the doors and hatches and the sweeper seal on the main entry door. You can also use this procedure to repair the pressure seal on the pressure sealed access doors.
　
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