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52-10-00-003
DOORS - PASSENGER/CREW - HANDLE MECHANISM
DOORS - PASSENGER/CREW - HANDLE MECHANISM
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.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
52-10-00-003
THIS PAGE IS INTENTIONALLY LEFT BLANK
DOORS - PASSENGER/CREW - HANDLE MECHANISM
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.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
Purpose
The door guide aligns the aft edge of the door when it swings
closed.
When the airplane is unpressurized, the door latches hold the
door closed.
When the airplane is pressurized, the door stop fittings transmit
the pressure loads from the door to the door frame.
Location
The door guide, latch, and stop fittings are on the door edges
and the door frame.
Door Guide - General Description
The door guide mechanism has these two parts:
* A guide pin on the aft door edge
* A guide track on the door aft frame
The guide track is a fairlead for the guide pin. It indexes the aft
edge of the door when it closes. This aligns the door latches
and stop pins with their door frame fittings.
Door Latches - General Description
There are four door latch mechanisms. Each door latch
mechanism has these two parts:
* A roller latch on the door
* A latch track on the door frame.
When you turn the door handle, the door roller latches turn by
the latch torque tubes. When the door is closed and latched, the
door latches mate with latch track fittings in the door frame.
The door latches are overcenter devices. They do these things:
* Compress the door seals
* Hold the door closed (on an unpressurized airplane)
* One latch operates the door warning sensor.
On a pressurized airplane, the pressure load causes the door to
move outboard slightly. This movement does these things:
* Compresses the door seals
* Unloads the door latch fittings
* Seats the door stop fittings and puts the door pressure loads
on them.
Door Stops - General Description
Each door stop fitting has these parts:
* An adjustable door-mounted pin with lockwire
* A buttressed frame-mounted pressure pad.
DOORS - PASSENGER/CREW - GUIDE, LATCH, AND STOP FITTINGS
EFFECTIVITY
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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
52-10-00-004
When the airplane is unpressurized, there is a small clearance
between the door pins and frame pads. When the airplane is
pressurized, the door moves outboard slightly. This causes the
door pins to contact the frame pads. The pins transmit the
pressure loads from the door to the door frame.
DOORS - PASSENGER/CREW - GUIDE, LATCH, AND STOP FITTINGS
EFFECTIVITY
GUN ALL 52-10-00
Page 14
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
52-10-00-004
DOORS - PASSENGER/CREW - GUIDE, LATCH, AND STOP FITTINGS
DOORS - PASSENGER/CREW - GUIDE, LATCH, AND STOP FITTINGS
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
52-10-00-004
Purpose
The door torque tubes do these things:
* Give structural support to the door and hinges
* Give the door and hinges a pivotal axis
* Give the door cocking crank pushrod a structural reaction
member (door torque tube only)
* Give the assist springs a structural reaction member (frame
torque tube only).
Location
The door system has these two torque tubes:
* Door torque tube in the door
* Frame torque tube in the door frame.
To get access to the door torque tube, remove the door liner
and access panel.
To get access to the frame torque tube, remove the access
panel on the interior of the airplane between the upper and
lower hinges.
Door Torque Tube - General Description
The door torque tube has several short sections held together
by cross-bolt sleeves. The center section is held in the central
door casting bearings by two castle nuts. The ends of the torque
tube are cross-bolted 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
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