500
52-61-531 Page 506 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 15/77
FORWARD AIRSTAIR DOOR ACTUATOR SNUBBER -REMOVAL/INSTALLATION
1. Remove Door Actuator Snubber (Fig. 401)
A. Open the forward airstair door and leave airstair fully retracted.
B. Open following circuit breakers on P6 panels:
(1)
FORWARD AIRSTAIR CONTROL
(2)
FORWARD AIRSTAIR DOOR
(3)
FORWARD AIRSTAIR ACTUATOR
(4)
FORWARD AIRSTAIR STANDBY CONTROL
(5)
FORWARD AIRSTAIR STANDBY
C. Remove two jackscrew nut bushings and disengage jackscrew nut from carriage.
D. Move airstair door to closed position and temporarily secure.
E. Remove locknut and washer from inboard end of jackscrew and withdraw jackscrew from actuator.
F. Remove snubber from end of jackscrew.
2. Install Door Actuator Snubber
A. Position snubber over splines on end of jackscrew shaft with rubber face away from ball nut.
B. Insert jackscrew into actuator.
C. Compress snubber approximately 0.27 inch until jackscrew is bottomed in actuator.
D. Install washer and self-locking nut on inboard end of jackscrew.
E. Release door from its temporarily secured position and connect jackscrew ball nut to carriage with jackscrew nut bushings.
F. Manually operate carriage along rails by rotating actuator manual drive and check that jackscrew drives freely.
(1) If necessary, adjust lower guide fitting so that carriage aligns properly without binding against either carriage guide rails.
G. Close all circuit breakers on P6 panel opened in step 1.B.
H. Check adjustment of door closed limit switches (Ref. 52-61-601 A/T).
I. Check adjustment of door open limit switches (Ref. 52-61-611 A/T).
500
Jun 20/86 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 52-61-541 Page 401
Forward Airstair Door Actuator Snubber Installation 500
52-61-541 Page 402 Figure 401 (Sheet 1) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Jun 20/86
500 Forward Airstair Door Actuator Snubber Installation
Jun 20/86 Figure 401 (Sheet 2) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 52-61-541 Page 403
FORWARD AIRSTAIR DOOR NORMAL SYSTEM MOTOR - REMOVAL/INSTALLATION
EFFECTIVITY
Standard Passenger Airplanes
1. Remove Forward Airstair Door Normal System Motor (Fig. 401)
A. Open the following circuit breakers on circuit breaker panel P6:
(1)
FORWARD AIRSTAIR CONTROL
(2)
FORWARD AIRSTAIR DOOR
(3)
FORWARD AIRSTAIR ACTUATOR
(4)
FORWARD AIRSTAIR STANDBY CONTROL
(5)
FORWARD AIRSTAIR STANDBY
B. Gain access to work area through electronic compartment access door.
C. Disconnect normal system motor electrical connector (Fig. 401).
D. Remove lockwire from bolts.
E. Remove the four bolts attaching motor to forward side of actuator and carefully remove motor. Remove shim and retain.
2. Install Forward Airstair Door Normal System Motor (Fig. 401)
A. Measure with a depth micrometer and record the dimension between the outer face of ball bearing in actuator housing and face of actuator housing.
B. Measure depth of mounting pilot of commutator end housing with depth micrometer.
C. Install shims with thickness equal to difference between two dimensions.
D. Position motor on forward side of actuator and install four attaching bolts. Electrical connector should be in line with identification plate.
E. Install lockwire on attaching bolts.
F. Connect electrical connector to normal system motor.
G. Close forward airstair circuit breakers on P6 panel.
H. Operate airstair through complete normal cycle to check operation of normal system motor.
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.
5C8
Feb 20/92 52-61-581 Page 401
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
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