52-11-41
ALL ú ú B01 Page 411 ú Nov 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
H85116
A
737-300/400/500MAINTENANCE MANUAL
AFT ENTRY DOOR - DESCRIPTION AND OPERATION
__________________________________________
1. General_______
A. The aft entry door is located on the left side of the fuselage approximately opposite the and aft galley service door (Fig. 1). An upper and a lower hinge assembly supports the door on the forward edge in the door opening. The door may be closed or opened from inside or outside.
B. The door is opened by manually operating the centrally located handle, to cause an internal mechanism within the door to release roller latches on the door from latch fittings on the door jambs, fold the gates inward, and move the door to the most inward position. The door is then manually swung through the door opening and stowed in the open position by the engagement of a latch pin in a hole in the upper guide plate at the upper hinge.
C. The door is guided during the final closing operation by a centering guide attached to the center of the aft edge of the door engaging with a centering track located on the aft frame of the door opening (Fig. 1). When the door is in the closed position and the passenger cabin is pressurized, door stops mounted on the forward and aft frames of the door opening contact adjustable door stop pins attached to the forward and aft edges of the door. The door stops transmit the pressurization loads on the door to the fuselage structure surrounding the door and prevent excessive deflection of the seal attached around the entire edge of the door. A flap is located at both the upper and lower hinges in cutouts in the body skin and is attached by spring-loaded hinges to the forward frame of the door opening. The flap covers the gap between the hinge link and body skin around the hinge cutouts when the door is in the closed position. Water drains are provided at the upper and lower hinge locations and along the lower edge of the lower gate. A proximity switch, attached to the door and door frame, is included in the circuit for the door warning system (Ref 52-71-00). Assist handles are provided to give additional control during the door operating cycle.
D. A removable body skin panel is located between the upper and lower hinge attach points which provides access to the hinge torque tube for overhaul purposes.
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52-13-00
ALL ú ú B01 Page 1 ú Mar 15/92
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
UPPER GATE DOOR STOP (EXAMPLE)
SEE FLATCH ROD
DOOR LATCH
CONTROL ROD (EXAMPLE)
SEE F
WINDOW ASSIST HANDLE
DOOR INSIDE
UPPER HINGE
HANDLE
SEE D
DOOR CENTERING
DOOR INSIDEGUIDE AND TRACK
SKIN CUTOUT
SEE A
HANDLE MECHANISM
HOUSING
SEE BFORWARD MECHANISM ACCESS PANEL
DOOR INSIDE SKIN CUTOUT
LATCH ROD
LOWER HINGE
SEE E
CONTROL ROD
LOWER GATE
SNUBBER
SELF-LOCKING NUTPLATE (3 LOCATIONS)FWD AFT FRAME
PLATE PLATE
ADJUSTABLE ROLLER FITTINGCENTERING CHANNEL
TRACK
FLAT WASHER
HEX HEAD CLOSE
TOLERANCE BOLT
CENTERING SELF-LOCKING HEX NUT GUIDE
FLAT WASHER
SPACER
FLAT WASHER
(2 LOCATIONS) HEX HEAD CLOSE TOLERANCE BOLT (2 LOCATIONS)
DOOR CENTERING GUIDE AND TRACK
A
Aft Entry Door Mechanism
Figure 1 (Sheet 1)
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52-13-00
ALL ú ú B01 Page 2 ú Nov 15/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
OUTSIDE HANDLE
SEAL PLATE HANDLE SLEEVE
CONTROL ROD
HANDLE CENTERING CAM MECHANISM HOUSING
OUTSIDE HANDLELATCHING CRANK SHAFT
BEARING SEAL
SNAP RING SLEEVE HOUSING
CAM ROLLERS VERTICAL CAM PLATE
ADJUSTMENT NUT
SEE C BEARING TORQUE TUBE CRANK
TORQUE TUBESHIM
BEARING BEARING
BEARING
DOOR VERTICALRETAINER COCKING ADJUSTMENT NUT
DOOR
CONTROL ROD CRANK
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