Control Cabin Door Lock Circuit  500 
52-51-0Page 4   Figure 2 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Feb 15/67 

CONTROL CABIN DOOR LOCK SWITCH/LIGHT - REMOVAL/INSTALLATION
1. General
A.  The control cabin door lock switch/light is attached to a switch coverplate mounted on the aft coverplate of the P8 control stand. Replaceable parts of the switch/light are light bulbs, switch/light actuator and switch.
B.  Light bulbs are accessible for replacement by removing the light cap. The switch is attached to the switch/light by a retaining clip and is accessible for replacement by either removing the switch coverplate or by gaining access through a door located on the aft left side of the control stand.
NOTE:  If the light cap and socket assembly are squeezed together during relamping the lock pins will cam out of the plunger which could on installation, force the lamp terminal assembly out of the base or prevent complete assembly.
2.  Remove Control Cabin Door Lock Switch/Light
A.  Open control cabin DOOR LOCK circuit breaker on panel P6.
B.  Remove access door cover located on the aft left side of the control stand by removing four screws. (See figure 401.)
C.  Disconnect and mark electrical wires on switch/light terminal box.
D.  Remove switch coverplate with attached switch/light from control stand coverplate by removing two switch mounting screws.
E.  Remove door lock switch/light from switch coverplate. (Detail A, Fig. 401).
(1)  
Remove two screws on bottom of switch/light and detach mounting bracket.

(2)  
Slide switch/light out of hole in coverplate.

500 
May 15/70  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  52-51-12 Page 401 

Control Cabin Door Lock Switch/Light Installation  500 
52-51-12  Figure 401  Aug 15/68 
Page 402 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

3.  Install Control Cabin Door Lock Switch/Light (See figure 401.)
A.  Attach door lock switch/light to switch coverplate. (See detail A, figure 401.)
(1)  
Slide switch/light into hole in coverplate.

(2)  
Attach mounting bracket on bottom of switch/light with two switch assembly screws.

B.  Install switch coverplate with attached switch/light on control stand coverplate. Secure coverplate with switch mounting screws.
C.  Connect electrical wires on switch/light terminal box.
D.  Install access door cover on proper location with four screws.
E.  Close control cabin DOOR LOCK circuit breaker on panel P6.
F.  Test control cabin door lock switch/light. See Control Cabin Door Lock Switch/Light -Adjustment/Test.
500 
Aug 15/68  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  52-51-12 Page 403 

CONTROL CABIN DOOR LOCK SWITCH/LIGHT - ADJUSTMENT/TEST
1. Test Control Cabin Door Lock Switch/Light
A.  Connect external, 400 cps 115/200 volt ac 3-phase, power supply to external power receptacle unless APU is being used.
B.  Check that control cabin DOOR LOCK circuit breaker on panel P6 is closed.
C.  Push down on control cabin door lock switch/light cap on the P8 control stand if light in cap is off.
D.  Check that light in cap comes on.
NOTE:  When light is on, striker on partition is not energized and door is unlocked 
(Ref 52-51-0, Fig. 2).

E.  Close control cabin door.

F.  Check that door can be opened with a minimum pull which does not exceed 60 pounds from passenger cabin.
G.  Push down on control cabin door lock switch/light cap.
H.  Check that light goes off.
NOTE:  When light is off, striker on partition is energized and door is locked (Ref 52-51-0,  Fig. 2).
I.  Close control cabin door.
(1)  
Check that door is locked from passenger cabin.

NOTE:  Shear pin on striker can withstand 250 pounds pull at door knob.

(2)  
Using door key, check that door can be unlocked from passenger cabin.

(3)  
Check that door can be opened from control cabin.

J.  Determine if there is further need for electrical power; if not, remove power.
500 
May 20/82  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  52-51-12 Page 501 

CONTROL CABIN DOOR LOCK - REMOVAL/INSTALLATION
1. General
A.  The control cabin door lock assembly is attached to the inside of the right hand door frame structure. A cutout is provided in the door frame structure to facilitate easy removal of the door lock assembly.
　
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