(5)
Pull step support arms from transmission units.
(6)
Remove screws attaching flange and hinge arm to free motion flanges.
(7)
Remove the eight wedges between free motion flange and transmission drive shaft on those airplanes with wedges.
(8)
Support airstair and remove from airplane.
(9)
Remove airstair from sling. Support upper segment and manually fold airstair while guiding programming arm. Store on a suitable support to protect airstair from damage.
500
May 15/71 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 52-14-0 Page 409
D. Install Aft Airstair
(1)
Support upper segment and unfold airstair to the full extended position while guiding programming arm.
NOTE: Before airstair is installed the aft entry door should be properly adjusted. Refer to Aft Entry Door and Airstair - Adjustment/Test.
(2)
Attach sling and lifting device to airstair.
NOTE: A 3-inch pipe passed through programming arm shaft may be used for lifting.
(3)
Raise hinge end of airstair and align with transmission drive shaft and free motion flanges. Insert eight wedges between transmission drive shaft and free motion flanges if used. Attach airstair to free motion flanges.
NOTE: Foot of airstair must be resting on ground surface 97 to 117 inches below entry door opening.
(4)
Connect radius rod to control arm on control console.
(5)
Insert top step support arms in transmission units.
(6)
Install bolts attaching top step to step support arms.
(7)
Connect tread light wiring at splices at floor level of door opening.
(8)
Remove segment hook cams.
(9)
Conduct airstair centrifugal governor test. Refer to 52-14-61, Aft Entry Door and Airstair Centrifugal Governor.
(10)
Retract airstair using manual drives on transmission units.
(11)
Move control handle to the latched position and adjust airstair. Refer to Aft Entry Door and Airstair - Adjustment/Test.
500
52-14-0 Page 410 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 15/71
AFT ENTRY DOOR AND AIRSTAIR - ADJUSTMENT/TEST
EFFECTIVITY
Airplanes with Aft Airstair
1. General
A. Initial adjustments to the entry door are made on the airplane with the airstair removed from the airplane. Adjustments for the airstair are made with the airstair installed on the airplane and the entry door removed from the airstair. Final adjustments to the entry door are made with the door on the airstair after the airstair has been installed, adjusted and retracted. Refer to Aft Entry Door and Airstair -Removal/Installation.
B. Before performing adjustment/test of the airstair and door, the control console, release handle and torsion bar assemblies must be properly installed and adjusted. The remaining major portions of the airstair must also be installed.
C. Since the adjustments on the airstair are made without the use of the emergency extension mechanism, the return cam in the emergency extension mechanism must be removed to prevent accidental damage to the mechanism. The emergency extension system is adjusted after the airstair and door are installed and adjusted. Refer to 52-14-21, Aft Airstair Emergency Extension Mechanism - Adjustment/Test.
2. Aft Entry Door and Airstair Adjustment
A. Equipment and Materials
(1) Corrosion Preventive Compound - MIL-C-16173, Grade 2
B. Adjust Entry Door
NOTE: These procedures may not be required if the same entry door is being reinstalled with no alterations. Also the doorway must not have been altered while the door was removed.
(1)
Remove door from airstair and remove airstair. Refer to Aft Entry Door and Airstair -Removal/Installation.
(2)
Remove top, side and bottom door lining panels if installed. Refer to 52-14-131, Aft Entry Door Lining - Removal/Installation.
(3)
Remove door pressure seal.
(4)
Remove all bolts in door cam fitting (2) except the upper inboard bolt on each fitting. This bolt must be loosened. (See section A-A.)
Aug 15/71 52-14-0 Page 501
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Aft Entry Door Adjustment 500
52-14-0 Figure 501 (Sheet 1) May 15/71
Page 502
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
500 Aft Entry Door Adjustment
May 15/68 Figure 501 (Sheet 2) 52-14-0
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