(a)  
Adjust the external control rod end bearing until above dimension is obtained.

(b)  
Check that threads are visible at inspection hole of rod end. If threads are not visible, or if cable is too long to adjust rod end, perform the following steps.

5C8
Feb 20/92 52-61-531 Page 501
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

Forward Airstair Door Lock Mechanism  500 
52-61-531 Page 502  Figure 501 (Sheet 1) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Nov 15/68 

501  Forward Airstair Door Lock Mechanism 
Jun 20/85  Figure 501 (Sheet 2) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  52-61-531 Page 503 

Forward Airstair Door Lock Mechanism Adjustment  500 
52-61-531  Figure 501 (Sheet 3)  Nov 15/68 
Page 504 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

1) Disconnect exterior control fork end fitting from rocker arm, and unscrew fork end. (Detail B) 2) Adjust cable lock to increase or decrease effective length of cable required. If
cable is too long, trim cable required amount. 3) Pull cable lock back to seat in telescopic unit. 4) Screw fork end in telescopic unit and torque 200 pound-inches. 5) Check that cable is visible at inspection hole in fork end fitting. 6) Repeat step (3).
(4)  
Close and latch the forward entry door and rotate the exterior control handle to its stops in either direction.

(5)  
Check that the top of door lock pin is 0.12 (+ 0.03/- 0.10) inch from bottom of airstair door cross pin. (Detail A) If adjustment is required, repeat step (3), (4), and (5), readjusting towards

(6)  
Close and latch the forward entry door and stow the exterior control handle.

(7)  
Check that top of the door lock pin is 0.13 (+ 0.06/- 0.04) inch above the top of the airstair door cross pin. (Detail A) If adjustment is required, repeat steps (3) through (7), readjusting towards opposite end of tolerance.

(a)  
If correct adjustment cannot be obtained, reposition control shaft actuating lever to increase or decrease effective interior control cable stroke. Refer to 52-61-531, Install Control Cable.

(b)  
Repeat steps (3) through (7).

(8)  
Install cotter pins, if removed, in nuts, which connect fork end fitting to rocker arm.

(9)  
Lockwire control box mounting nuts, fork end fitting nuts, micro-adjust and rod end fitting on exterior control handle, if removed.

(10)
Test airstair door lock mechanism in accordance with test procedure.

3.  Forward Airstair Door Lock Mechanism Test
A.  Test Door Lock Mechanism
500 
Nov 15/68  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  52-61-531 Page 505 

(1)  
Fully retract airstair and close airstair door.

(2)  
Open the following circuit breakers on the circuit breaker panel P6 if closed.

(a)  
Forward Airstair Control

(b)  
Forward Airstair Door

(c)  
Forward Airstair Actuator

(d)  
Forward Airstair Standby Control

(e)  
Forward Airstair Standby

(3)  
Open the forward entry door. Measure operating load of entry door-operated control lever by rotating the lever approximately 66 degrees counterclockwise (facing aft) pushing on inside of lever at about 1-inch radius from lever shaft axis with push-type scale. Check that force does not exceed 45 pounds (Fig. 501). Release lever and check that lever returns to original position without binding.

(4)  
Check top of airstair door lockpin is 0.12 + 0.03/- 0.10 inch below bottom of cross pin (Detail A).

(5)  
Close and latch forward entry door. Measure operating load of external control handle by rotating the handle about 45 degrees in both directions pulling on handle with push-pull type scale at about 4-inch radius from handle shaft axis in both directions. Check that force does not exceed 44 pounds. Release handle and check that handle operates without binding and returns to neutral position when released from any position.

(6)  
Hold exterior control handle in extend and retract positions and check top of lockpin is

0.12 + 0.03/- 0.10 inch below bottom of crosspin while handle is in each position (Detail A).

(7)  
Stow exterior control handle and check top of lockpin is 0.13 + 0.06/- 0.06 inch above top of crosspin.

(8)  
Close forward airstair circuit breakers opened in step 2.
　
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