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The door handle on the flight compartment side of the door connects to the door bolt. When you turn the handle the door bolt pulls out of the catcher and you can open the door into the flight compartment.
The door handle on the passenger compartment side of the door does not connect to the door bolt. You push on the door to open it. The door bolt pushes on the catcher. The catcher turns against its spring until the bolt moves past. When you close the door, the bolt pushes on the catcher. The bolt moves into the door against its spring until it moves past the strike.
The catcher and the lock are on the same bolt in the lock unit. Two balls are in detents, between the catcher and the lock. A spring washer (not shown) on the bolt, pushes the catcher, balls, and lock together. The roller attaches to the lock. When you open the door normally, the catcher, balls, lock, and roller turn together.
A flight compartment door lock switch (not shown) on the P5 lets you lock the door. The solenoid moves a pin up. When you try to push the door open from the passenger side, the roller pushes against the pin. The lock and catcher cannot turn.
Decompression
If there is fast decompression in the flight deck, passenger compartment air pressure pushes against the door. A 120 pound force compresses the spring washer sufficiently to let the balls in the detents disconnect the catcher from the lock. The catcher can turn. This releases the door to move on its hinge into the flight compartment.
If there is fast decompression in the passenger compartment, air pressure pushes the door toward the passenger compartment. A 120 pounds force breaks the door stop. This releases the door to move on its hinge into the passenger compartment.
EFFECTIVITY BEJ ALL PRE SB 777-25-0216  52-50-00 
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D633W101-BEJ  Sep 05/2003 

FIXED INTERIOR DOORS -FLIGHT COMPARTMENT DOOR -FUNCTIONAL DESCRIPTION
Door Sections
The door has upper and lower sections. They are held together by a clip and normally turn together. If a blockage on the floor will not let the door turn, the clip lets the sections disconnect. This releases the upper section to turn.
EFFECTIVITY BEJ ALL PRE SB 777-25-0216  52-50-00 
Page 6 
D633W101-BEJ  Sep 05/2003 

 

FIXED INTERIOR DOORS -FLIGHT COMPARTMENT DOOR -FUNCTIONAL DESCRIPTION

EFFECTIVITY BEJ ALL PRE SB 777-25-0216  52-50-00 
Page 7 
D633W101-BEJ  Sep 05/2003 

FIXED INTERIOR DOORS -FLIGHT COMPARTMENT DOOR -FUNCTIONAL DESCRIPTION

Door System
The flight compartment door provides selective entry to the flight compartment.
Access is provided by the use of a Keypad Access System which consists of a numeric keypad outside the flight compartment area and a chime module and electric strike that is not accessible from outside the flight compartment.
The chime module provides an audible alert to the flight crew that the correct code has been entered into the keypad. There is also an indicator light in the flight compartment and an LED on the keypad that indicates that the correct code has been entered.
The flight crew has a 3-position switch by which they can open the door lock, close the door lock, or permanently lock the door for a specified amount of time to prevent access by anyone regardless if the correct code is entered into the keypad.
The door has blowout panels that will open in the event of a rapid decompression of the passenger compartment.
A pressure sensor controls the electric strike and allows the door to open inward in the event of a rapid decompression in the flight compartment.
All access to system door control/wiring is protected such that they cannot be reached from outside the flight deck area, even after forced removal of the numeric keypad.
The door latch solenoid controls the electric strike.
　
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