(j)
Tighten all casing clamps and nut on control box shaft. Secure nut on control box shaft with sealant.
(k)
Adjust and test mechanism in accordance with adjustment/test procedure (Ref. Airstair Door Lock Mechanism - Adjustment/Test).
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4. Removal/Installation Lock Pin Assembly
A. General
(1) The lock pin assembly consists of a rocker arm assembly, a lock pin and a lock pin guide fitting (Detail B). The following procedure covers the complete assembly; for partial removal of the assembly omit steps for components not affected.
B. Equipment and Materials
(1) Grease - Silicon e Base - DC-33 (Ref. 20-30-21)
C. Remove Lock Pin Assembly
(1)
Open airstair door leaving airstair fully retracted.
(2)
Open the following circuit breakers on circuit breaker panel 16.
(a)
Forward Airstair Control
(b)
Forward Airstair Door
(c)
Forward Airstair Actuator
(d)
Forward Airstair Standby Control
(e)
Forward Airstair Standby
(3)
Remove cotter pin, nut, washer and bolt connecting fork-end fitting of each telescoping unit to rocker arm, and remove rocker arm and lock pin assembly.
(4)
Remove bolts attaching lock pin and/or sensor actuator mounting bracket to rocker arm to disassemble (if required).
(5)
Remove two bolts attaching lock pin guide fitting to door sill structure and remove guide fitting (if required).
D. Install Lock Pin Assembly
(1)
Position lock pin guide fitting under door sill and install bolts attaching guide fitting to structure (if removed).
(2)
Assemble lockpin and/or sensor actuator bracket to rocker arm (if disassembled).
(3)
Position rocker arm and lockpin assembly with chamfer on upper end of lockpin parallel with doorsill and end of rocker arm with greater offset forward. Attach rocker arm to fork-end fitting at each telescoping unit with bolt, nut, washer and cotter pin.
(4)
Hand lubricate lockpin and rocker arm attach points A, B, and C (Detail B) with DC-33 grease.
(5)
Adjust and test lock mechanism in accordance with adjustment/test procedure (Ref Forward Airstair Door Lock Mechanism - Adjustment/Test).
(6)
Adjust and test lockpin-indicating switch in accordance with adjustment/test procedure (Ref 52-71-0, Door Warning System).
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Aug 15/78 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 52-61-531 Page 413
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FORWARD AIRSTAIR DOOR LOCK MECHANISM -ADJUSTMENT/TEST
EFFECTIVITY
Standard Passenger Airplanes
1. General
A. Adjustment procedures should be performed after any of the door lock mechanism components have been replaced or the lock mechanism fails to operate properly. The adjustment procedures cannot be performed until all components are properly installed.
B. The test procedures should be performed only after all components of the door lock mechanism are installed and adjusted.
WARNING: DO NOT OPERATE THE AIRSTAIR WHEN THESE CONDITIONS OCCUR:
-YOU WILL OPERATE THE AIRSTAIR MORE THAN 3 CYCLES IN 20 MINUTES -THE WIND IS MORE THAN 40 KNOTS -THERE IS NO SUPPORT UNDER THE END OF THE AIRSTAIR WHEN THE
AIRPLANE IS ON JACKS -THE FORWARD ENTRY DOOR IS OPENED FULLY -THE AREA IS NOT CLEAR OF PEOPLE OR EQUIPMENT.
IF YOU OPERATE THE AIRSTAIR WHEN THESE CONDITIONS OCCUR, YOU CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
2. Equipment and Materials
A. Push-pull scale -0 to 50 pound capacity
3. Forward Airstair Door Lock Mechanism Adjustment
A. Adjust Door Lock Mechanism
(1)
Fully retract the forward airstair and check that the airstair door is closed.
(2)
Open the following circuit breakers on the circuit breaker panel P6.
(a)
Forward Airstair Control
(b)
Forward Airstair Door
(c)
Forward Airstair Actuator
(d)
Forward Airstair Standby Control
(e)
Forward Airstair Standby
(3)
With forward entry door open and exterior control handle stowed, check that top of airstair door lock pin is 0.12 +0.03/-0.10 inch from bottom of airstair door cross pin (Fig. 501). If adjustment is required, perform the following steps.
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