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DOORS - CONTROL CABIN DOOR - INTRODUCTION
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D633A101-GUN Feb 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
Purpose
The crew door lock system secures the crew door.
The door handle key lock is mechanical and locks or unlocks
the door handle bolt.
The door frame strike is an electromechanical assembly that
gives the flight crew a way to enable or disable the control cabin
door lock system from their seats.
Location
The door handle with a key-lock bolt is in the door.
The strike mechanism with an electric solenoid is in the door
frame.
General Description
The crew door lock system has these two assemblies:
* A door handle with a key-lock bolt
* A door frame strike assembly with an electric solenoid lock.
The door handle with key lock is a mechanical device. When the
key is inserted (unlocked), the handle will turn and move the
bolt out of the frame strike. When the key is not inserted
(locked), the handle will not turn, and the bolt will not move out
of the frame strike.
The strike mechanism is a spring-loaded, pivoting mechanical
device with an electrically controlled solenoid lock. When the
solenoid is de-energized, the strike is free to turn against spring
force. In this condition, the door handle bolt can push the strike
aside and allow the door to open. The force required at the
handle is 10 pounds (nominal).
When the solenoid is energized, it engages the strike with a
shear pin. This will not let the strike move. In this condition, the
door handle bolt cannot force the strike aside. If the door handle
is locked and the solenoid is energized, the door will not open.
The door security is a function of both the door handle key lock
and the door frame strike solenoid lock. The solenoid lock
enables or disables the strike.
Operational Controls and Displays
A key allows the door handle to turn which moves the bolt out of
the strike.
The CAB DOOR alternate action lighted push-button on the P8
stabilizer trim and cabin door module controls the power to the
strike solenoid. When the strike solenoid is de-energized, the
CAB DOOR UNLOCKED light comes on. When the strike
solenoid is energized, the CAB DOOR UNLOCKED light goes
out.
DOORS - CONTROL CABIN DOOR - DOOR LOCK
EFFECTIVITY
GUN 201-999 52-51-00
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D633A101-GUN Feb 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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Training Information Point
If there is an emergency, a locked crew door can be opened
from the passenger compartment. A pull force of 250 pounds
(nominal) on the door handle shears the solenoid shear pin.
When the pin shears, the crew door strike pivots away from the
bolt and the door opens.
DOORS - CONTROL CABIN DOOR - DOOR LOCK
EFFECTIVITY
GUN 201-999 52-51-00
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D633A101-GUN Feb 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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DOORS - CONTROL CABIN DOOR - DOOR LOCK
DOORS - CONTROL CABIN DOOR - DOOR LOCK
EFFECTIVITY
GUN 201-999 52-51-00
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D633A101-GUN Feb 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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Flight Compartment Door
The flight compartment door consists of two decompression
blowout panels, a lock assembly, and a deadbolt.
The door opens about a piano hinge mounted on the flight
compartment partition. The hinge is attached to the partition
with screws.
An Observ-O-Scope in the door allows flight crew members to
see into the passenger compartment.
The door has blowout panels installed that will open forward in
the event of a decompression in the control cabin.
Electric Strike
The electric strike consists of a solenoid, a spring mounted
strike, and a pin which prevents the strike from rotating.
The solenoid acts to lock the flight compartment door. When
28VDC is applied to the solenoid it closes, extending a pin to
prevent the strike from rotating. This prevents the door from
being opened from the aft (passenger) side.
When the solenoid is de-energized, the pin retracts and allows
the strike to rotate when sufficient force is applied to the door to
overcome the spring pressure.
FIXED INTERIOR DOORS - CONTROL CABIN DOOR - DOOR AND ELECTRIC STRIKE
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