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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
Location
The forward equipment compartment access door is forward of
the nose wheel well.
General Description
The door is a plug type door. It hinges on its aft edge and
swings open upward, into the fuselage.
The door structure is an aluminum casting. A continuous seal
around the door prevents loss of cabin pressure. Pressure
loads transmit from the door to the door frame by stop pins and
pads.
Two hinge arms on the door extend aft to engage hinge fittings
on the nose wheel well forward bulkhead.
A guide pin on the forward edge of the door aligns the door as it
closes.
The door latch mechanism holds the door closed, and has these
parts:
* Spring-loaded handle with a push-button release
* Handle shaft and link
* Latch pin plunger.
Operation
The handle fairs with the door skin. Push on the button marked
PUSH, and the handle extends from spring force.
Turn the handle counterclockwise and the latch pin retracts
from its boss. This unlatches the door. You can then push the
door open. A spring-loaded catch that engages the left side of
the door holds the door fully open. When the door is open, you
can turn the handle clockwise and push it into its recess.
When you close the door, you must extend the handle and turn it
counterclockwise to retract the latch pin. This allows the door to
seat in its frame. When the door is closed, it latches with a
clockwise turn of the handle. This forces the latch pin into the
frame boss. When the door is closed and latched, push the
handle back into its recess.
Operational Displays
The forward equipment compartment access door has an
interface with the door warning system. It shares the P5 panel
EQUIP door warning light with the EE compartment external
access door.
When the door is not latched, the latch pin does not push on the
door warning microswitch. The switch closes and the P5 panel
EQUIP door warning light comes on.
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When the door latches, the latch pin enters the frame boss and
opens the door warning microswitch. This removes the ground
from the light.
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DOORS - SERVICE - FORWARD ACCESS DOOR
52-40-00
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D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
Location
The door is on the bottom of the fuselage, aft of the nose wheel
well.
General Description
The door is a plug-type door. It is a cast frame with aluminum
skins.
When the door opens, it slides upward and to the right. In the
fully open position it stows in the fuselage, to the right of the
door frame. You operate the door from outside the airplane.
The door has these parts:
* Door latch mechanism
* Door rollers
* Fuselage door roller tracks
* Door seal.
Door Latch Mechanism
A spring-loaded handle with a push-button release controls the
latch mechanism. The handle fairs with the fuselage skin until it
is released. The handle shaft turns a pinion gear in the door that
drives four rack gear latch pins. This causes the pins to engage
or disengage the latch pin fittings on the door frame. The latch
pins transmit the door pressure loads to the door frame.
The fittings have lugs that will transmit the pressure loads
safely even if the latch pins are unlatched.
Door Rollers and Fuselage Roller Tracks
The door has three sets of rollers that run in tracks attached to
fuselage structure. Together, the rollers and tracks control the
motion of the door as it slides open or closed.
Gravity detents in the tracks hold the door in place at the
partially open and the full open positions.
The inboard parts of the roller tracks fold to improve access to
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