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 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.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
UPPER GATE (TYPICAL) DOOR STOP
SEE F
LATCH ROD
DOOR LATCH
(TYPICAL)

CONTROL ROD
SEE F
WINDOW ASSIST HANDLE
UPPER HINGE
DOOR INSIDE SEE D HANDLE
DOOR INSIDE DOOR CENTERING
SKIN CUTOUT
GUIDE AND TRACK HANDLE MECHANISM SEE A HOUSING
SEE B FORWARD MECHANISM ACCESS PANEL
DOOR INSIDE SKIN CUTOUT LATCH ROD
LOWER HINGE
SEE E
CONTROL ROD
LOWER GATE SNUBBER
SEE E
SELF LOCKING NUTPLATE (3 PLACES)
FWD
AFT FRAME
PLATE
PLATE
ADJUSTABLE
ROLLER FITTING

FLAT WASHER
CHANNEL HEX HEAD CLOSE TOLERANCE BOLT CENTERINGSELF LOCKING HEX NUT
TRACK FLAT WASHER CENTERING GUIDE
SPACER
FLAT WASHER
(2 PLACES)

HEX HEAD CLOSE
TOLERANCE BOLT

DOOR CENTERING GUIDE AND TRACK
(2 PLACES)
A

Galley Service Door Mechanism
Figure 1 (Sheet 1)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

737-300/400/500
MAINTENANCE MANUAL

OUTSIDE HANDLE 
SLEEVE HOUSING 
SEAL PLATE 
OUTSIDE HANDLE SHAFT 
HANDLE SLEEVE  HANDLE 
CENTERING CAM  CONTROL ROD  MECHANISM 
HOUSING 

LATCHING CRANK SEAL
BEARING
SNAP RING
CAM ROLLERSVERTICAL ADJUSTMENT NUT CAM PLATE
SEE CBEARING
TORQUE TUBE CRANK
SHIM TORQUE TUBE
BEARING BEARING VERTICAL
BEARINGADJUSTMENT NUT DOOR RETAINER
COCKING DOORCRANK CONTROL ROD
INSIDE PUSH ROD HANDLE
NOTE:MECHANISM SHOWN IN CLOSED AND LATCHED POSITION
HANDLE MECHANISM
B
PATH OF ROLLER ACTUATING LATCHING CRANK
CAM PLATE PIVOT CENTER  PATH OF ROLLER ACTUATING DOOR COCKING CRANK 
CAM PLATE 
C 
Figure 1 (Sheet 2) Galley Service Door Mechanism 

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
　
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