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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
52-10-00-008
DOORS - PASSENGER/CREW - AFT ENTRY DOOR UPPER HINGE ASSEMBLY
DOORS - PASSENGER/CREW - AFT ENTRY DOOR UPPER HINGE ASSEMBLY
EFFECTIVITY
GUN ALL 52-10-00
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D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
52-10-00-008
Purpose
The lower door hinge assembly does these functions:
* Slows (snubs) and stops the door at the ends of the swing
* Structurally holds the door.
Location
The lower hinge assembly is on the forward edge of the door.
General Description
The lower hinge assembly has these parts:
* Hinge arm
* Door snubber and stop assembly.
The lower hinge arm is a beam that holds the door structure.
One end of the hinge arm mates with the door torque tube hinge
pin in a bearing. The other end of the hinge arm attaches to the
frame torque tube spigot with an oval section and pinch bolt.
The door torque tube turns freely about the hinge arm. The
frame torque tube turns with the hinge arm.
A door snubber hydraulically slows (snubs) the door at the ends
of the swing.
The snubber is an oil filled, telescopic, orifice-type metering
device. It limits the rate of motion at the full extend and full
retract positions. As the door opens, it goes from fully retracted
to fully extended. The snubber is held by pins in its spherical
bearings. One pin holds the snubber to door structure. A second
pin holds the other snubber bearing to the frame torque tube
radius link.
The bottom frame torque tube spigot pins the radius link to the
frame torque tube. The radius link has a stop pin. Stop plates
limit the range of motion of the stop pin. At the door or fully open
positions, the stop pins contact the stop plates. This moves the
snubber, and damps door motion.
Spring-loaded retainers on the door frame support pressure
seals around the hinge assembly.
A cover plate on the outside of the hinge assembly covers the
gap around the hinge cutouts. This cover is an aerodynamic
seal. It reduces noise and drag. A spring-loaded hinge attaches
the cover to the hinge arm.
DOORS - PASSENGER/CREW - LOWER HINGE ASSEMBLY
EFFECTIVITY
GUN ALL 52-10-00
Page 28
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
52-10-00-009
DOORS - PASSENGER/CREW - LOWER HINGE ASSEMBLY
DOORS - PASSENGER/CREW - LOWER HINGE ASSEMBLY
EFFECTIVITY
GUN ALL 52-10-00
Page 29
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
52-10-00-009
THIS PAGE IS INTENTIONALLY LEFT BLANK
DOORS - PASSENGER/CREW - LOWER HINGE ASSEMBLY
52-10-00
Page 30
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
General
You open and close the door manually. Use these steps to open
the door from the airplane interior:
* Move the door to the cocked open position with the control
handle
* Push the door to the fully open position with the door assist
handles.
Use these steps to close the door:
* Release the upper hinge lock latch
* Pull the door to the closed position with the door assist
handles
* Fully close and latch the door with the control handle.
Open the Door
An escape slide is on the inside lower door. If the slide girt bar
is in the armed position, the slide will deploy automatically as
the door opens. Make sure the slide girt bar is in the stowed
position if you do not want the slide to deploy.
The door swings out of the door frame when it opens. Make
sure the area outside of the door is clear.
Turn the interior control handle counterclockwise. Initial
movement of the handle causes the door interior mechanisms
to do these things:
* Door latch roller mechanisms disengage from their door
frame latch track fittings
* Door warning sensor target moves away from the sensor.
This causes the FWD ENTRY or AFT ENTRY door warning
light
* Dpper and lower door gates fold inward. This makes the
door smaller, breaks the door seal, and vents any cabin
differential pressure.
As you continue to turn the handle to the end of the stroke, (170
deg) the door mechanisms to do these things:
* Cocking mechanism swings the door hinge arms (and the
door) inward
　
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