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tube cross-bolt to hinge pins. Hinge arm bearings hold the
hinge pins.
Frame Torque Tube - General Description
The frame torque tube has several short sections held together
by cross-bolt sleeves. The center section of the tube is held in
monoball frame bearings. The ends of the torque tube bolt to
oval spigots. The spigot ovals mate with the hinge arms.
DOORS - PASSENGER/CREW - AFT ENTRY DOOR TORQUE TUBES
EFFECTIVITY
GUN ALL 52-10-00
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DOORS - PASSENGER/CREW - AFT ENTRY DOOR TORQUE TUBES
DOORS - PASSENGER/CREW - AFT ENTRY DOOR TORQUE TUBES
EFFECTIVITY
GUN ALL 52-10-00
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DOORS - PASSENGER/CREW - AFT ENTRY DOOR TORQUE TUBES
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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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.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
Purpose
The upper hinge assembly does these functions:
* Supports the weight of the door
* Controls the motion (swing and rotation) of the door as it
opens and closes.
Location
The upper hinge assembly is on the forward edge of the door.
General Description
The upper hinge assembly has these parts:
* Hinge arm
* Guide arm assembly
* Hinge lock mechanism.
The upper hinge arm is a beam that holds and supports the
door structure.
One end of the hinge arm mates with the door torque tube
hinge. The other end of the hinge arm attaches to the frame
torque tube spigot with an oval section and pinch bolt. The
hinge arm turns with the door torque tube. The frame torque
tube turns with the hinge arm.
The door rotates as it swings open or closed. A guide arm
mechanism programs the door rotation. This is a pantagraph
mechanism. A pin holds the spherical bearing of the guide arm
to door structure. The other end is held by these devices:
* Roller that follows S-tracks in upper and lower guide plates
* Radius link that is connects the guide arm to the frame
torque tube spigot.
Door motion toward open stops when the guide arm roller
bottoms out in the guide plate S-tracks.
A latch mechanism in the guide arm locks the upper door hinge
in the wide open position. When the door is fully open, a spring
loaded pin goes into a detent in the upper guide plate. The pin is
concentric to the roller.
To close the door, you must release the hinge from lock. Use
one of these to release the hinge from lock:
* Yellow lever on the upper hinge guide arm
* Yellow pushbutton on the upper hinge guide arm
* Yellow release knob on the door frame between the upper
and lower hinges.
Push the lever or pushbutton, or lift on the release knob to
release the hinge from lock. A latch trigger on the guide arm
resets the lock mechanism.
DOORS - PASSENGER/CREW - FORWARD ENTRY DOOR UPPER HINGE ASSEMBLY
EFFECTIVITY
GUN ALL 52-10-00
Page 21
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
52-10-00-007
Spring-loaded retainers support pressure seals around the
hinge assembly.
A cover plate on the outside of the upper hinge assembly
covers the gap around the hinge cutouts. This cover is an
aerodynamic seal. It decreases noise and drag.
DOORS - PASSENGER/CREW - FORWARD ENTRY DOOR UPPER HINGE ASSEMBLY
EFFECTIVITY
GUN ALL 52-10-00
Page 22
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
52-10-00-007
DOORS - PASSENGER/CREW - FORWARD ENTRY DOOR UPPER HINGE ASSEMBLY
DOORS - PASSENGER/CREW - FORWARD ENTRY DOOR UPPER HINGE ASSEMBLY
EFFECTIVITY
GUN ALL 52-10-00
Page 23
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
52-10-00-007
THIS PAGE IS INTENTIONALLY LEFT BLANK
DOORS - PASSENGER/CREW - FORWARD ENTRY DOOR UPPER HINGE ASSEMBLY
52-10-00
Page 24
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
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