Forward Airstairs Manual Handrail Stowed Switches Installation 522
52-61-181Page 402 Figure 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Aug 15/71
3. Install Forward Airstair Manual Handrail Stowed Switches
NOTE: Cord should be inside of and extending from both ends of wire route through upper stanchion to pivot fitting.
A. Tie pivot fitting end of cord to ends of both leads of replacement switch. Pull cord from lower end until leads emerge. Disconnect cord and discard.
B. Connect wire leads to switch electrical connector and install connector in receptacle.
C. Thread replacement switch onto switch support and install jamnut.
D. Adjust switch. Refer to Forward Airstair Manual Handrail Stowed Switches - Adjustment/Test.
502
May 15/69 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 52-61-181 Page 403
FORWARD AIRSTAIR MANUAL HANDRAIL STOWED SWITCHES - ADJUSTMENT/TEST
EFFECTIVITY
Standard Passenger Airplanes
1. General
A. The forward and aft manual handrail stowed switches are identical and are adjusted and tested in the same manner. The following procedures are applicable to either switch.
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. Forward Airstair Manual Handrail Stowed Switches Adjustment
A. Adjust Manual Handrail Stowed Switches
(1)
Operate forward airstair to fully extended position and disengage manual handrail extensions.
(2)
Open forward airstair system circuit breakers on circuit breaker panel P6.
(3)
Remove switch cover and screws attaching switch support to upper handrail and remove switch support (Fig. 501).
(4)
Loosen jamnut and thread switch onto support until end of plunger is 0.73 to 0.76 inch from top surface of switch support.
(5)
Lockwire jamnut and reinstall switch support and cover.
(6)
Test switches (Ref par. 3).
3. Forward Airstair Manual Handrail Stowed Switches Test
A. Equipment and Materials
(1) Voltohmmeter - Simpson Model 260
B. Test Manual Handrail Stowed Switches
(1)
Operate airstairs to fully extended position and disengage handrails.
(2)
Open forward airstair system circuit breakers on circuit breaker panel P6.
(3)
Connect voltohmmeter across pins 1 and 3 of electrical connector P15 for forward handrail switch or P16 for aft handrail switch. (See Fig. 501 for connector location.) An open circuit should be indicated.
(4)
Stow handrail. Continuity should be indicated on voltohmmeter.
(5)
Remove voltohmmeter and reconnect electrical connectors.
(6)
Close forward airstair system circuit breakers on circuit breaker panel P6.
5C8
Feb 20/92 52-61-181 Page 501
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Forward Airstairs Manual Handrail Stowed Switches Adjustment 522
52-61-181 Figure 501 Feb 15/71
Page 502
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
FORWARD AIRSTAIR LOWER LADDER LOCK - ADJUSTMENT/TEST
EFFECTIVITY
Standard Passenger Airplanes
1. Forward Airstair Lower Ladder Lock Adjustment
A. Adjust Lower Ladder Lock
(1) Operate forward airstair to fully extended position.
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.
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