Forward Airstair Extend Limit Switches Adjustment 500
52-61-151 Figure 501 (Sheet 2) Feb 20/92
Page 504
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
500 Forward Airstair Extend Limit Switches Adjustment
Feb 20/92 Figure 501 (Sheet 3) 52-61-151
Page 505
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
FORWARD AIRSTAIR LOWER LADDER OPERATING SWITCH - REMOVAL/INSTALLATION
EFFECTIVITY
Standard Passenger Airplanes
1. Remove Forward Airstair Lower Ladder Operating Switch
A. Extend forward airstair fully.
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.
B. Open forward airstair circuit breakers on circuit breaker panel P6.
C. Disconnect electrical wiring from lower ladder operating switch (Fig. 401).
D. Remove switch mounting nuts and remove switch from angle attached to ladder truck.
2. Install Forward Airstair Lower Ladder Operating Switch
A. Position lower ladder operating switch on mounting angle attached to ladder truck and adjust mounting nuts so that switch is positioned as far forward as threads permit.
B. Connect electrical wiring to switch.
C. Adjust switch (Ref 52-61-161 A/T).
5C8
Feb 20/92 52-61-161 Page 401
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Forward Airstair Lower Ladder Operating Switch Installation 500
52-61-161 Figure 401 Aug 15/69
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
FORWARD AIRSTAIR LOWER LADDER OPERATING SWITCH - ADJUSTMENT/TEST
EFFECTIVITY
Standard Passenger Airplanes
1. Forward Airstair Lower Ladder Operating Switch Adjustment
A. Equipment and Materials
(1) Voltohmmeter - Simpson, Model 260
B. Adjust Forward Airstair Lower Ladder Operating Switch
(1) Fully extend forward airstair.
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)
Open the following circuit breakers on circuit breaker panel P6:
(a)
Forward Airstair Control
(b)
Forward Airstair Standby Control
(3)
Loosen jamnuts holding switch to mounting bracket and move switch roller until roller just contacts ramp (Fig. 501).
(4)
Connect ohmmeter between pins 1 and 3 of connector on upper ladder truck and check that switch is open.
(5)
Adjust jamnuts to move switch until switch plunger is depressed 0.16 0.01/-0.01 inch and check that switch is closed.
(6)
Disconnect ohmmeter and reconnect connector on upper ladder truck.
(7)
Lockwire jamnuts and open circuit breakers.
5C8
Feb 20/92 52-61-161 Page 501
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Forward Airstair Lower Ladder Operating Switch Adjustment 500
52-61-161 Figure 501 (Sheet 1) Nov 15/68
Page 502
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
FORWARD AIRSTAIR LOWER LADDER CLOSED SWITCH - REMOVAL/INSTALLATION
EFFECTIVITY
Standard Passenger Airplanes
1. Remove Lower Ladder Closed Switch
A. Operate 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.
IF YOU OPERATE THE AIRSTAIR WHEN THESE CONDITIONS OCCUR, YOU CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
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