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receiver. This causes the door to move inboard and down. This
inboard and downward movement lets the door clear the stop
fittings and open.
DOORS - EMERGENCY EXIT DOOR - HANDLE MECHANISM
EFFECTIVITY
GUN ALL 52-22-00
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D633A101-GUN Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
52-22-00-003
DOORS - EMERGENCY EXIT DOOR - HANDLE MECHANISM
DOORS - EMERGENCY EXIT DOOR - HANDLE MECHANISM
EFFECTIVITY
GUN ALL 52-22-00
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D633A101-GUN Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
52-22-00-003
Purpose
The hinge arm lock pawl mechanism latches the door in the
open position.
Location
One lock pawl mechanism is on each side of the emergency exit
door frame.
General Description
The hinge arm lock pawl mechanism has these components.
* Lock crank
* Lock pawl
* Lock pawl depressor
* Torsion spring.
The lock crank and the lock pawl work together to stabilize the
door when it is open.
The lock pawl depressor prevents the lock pawl from
engagement of the hinge arm before the door is fully open.
This lets the hinge arm and door move freely between the latch
and unlatch positions.
The torsion spring pushes the lock pawl to the lock position.
DOORS - EMERGENCY EXIT DOOR - HINGE ARM LOCK PAWL MECHANISM
EFFECTIVITY
GUN ALL 52-22-00
Page 10
D633A101-GUN Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
52-22-00-004
DOORS - EMERGENCY EXIT DOOR - HINGE ARM LOCK PAWL MECHANISM
DOORS - EMERGENCY EXIT DOOR - HINGE ARM LOCK PAWL MECHANISM
EFFECTIVITY
GUN ALL 52-22-00
Page 11
D633A101-GUN Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
52-22-00-004
Purpose
The hinge arm lets the emergency exit door open and close.
Location
The hinge arm is on the upper half of the door.
Description
The hinge arm-to-body mechanism has these components.
* Hinge arm
* Swing links
* Hinge arm latch roller
* Hinge arm latch track.
The hinge arm connects the door to the fuselage structure. This
gives the door an attachment point to turn while the door opens
and closes.
The swing links attach to the lower section of the hinge arm.
They let the door move about the hinge arm between the open
and close positions.
The hinge arm rollers and hinge arm latch track work together
to direct the door motion.
When the door opens and closes, the shape of the latch tracks
controls the motion of the door. The door moves to properly
engage or disengage the door pressure stops.
Training Information Point
The adjustment screws and slotted plate on the two piece roller
intercostals are for the door vertical adjustments between the
door and hinge arm.
DOORS - EMERGENCY EXIT DOOR - HINGE ARM-TO-BODY MECHANISM
EFFECTIVITY
GUN ALL 52-22-00
Page 12
D633A101-GUN Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
52-22-00-005
DOORS - EMERGENCY EXIT DOOR - HINGE ARM-TO-BODY MECHANISM
DOORS - EMERGENCY EXIT DOOR - HINGE ARM-TO-BODY MECHANISM
EFFECTIVITY
GUN ALL 52-22-00
Page 13
D633A101-GUN Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
52-22-00-005
Purpose
The counterbalance mechanism turns the door and hinge arm
to the full open position.
Location
The counterbalance mechanism attaches to the top of the hinge
arm and auxiliary sill structure.
Description
The counterbalance mechanism has these components.
* Counterbalance assembly
* Hydraulic snubber.
The counterbalance assembly opens and keeps the door in the
open position. An internal stop limits the range of travel in the
open direction.
The hydraulic snubber limits the maximum angular velocity of
the hinge arm when the door opens. The hydraulic snubber lets
the door open in the required time.
When the door is opened, trapped fluid in the snubber cylinder
is forced to the piston reservoir through an internal fixed orifice.
The door is snubbed by this action. When the door is closed, the
silicone fluid returns to the snubber cylinder through a check
　
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