500 
Oct 20/92  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  52-14-0 Page 505 

Aft Airstair Adjustment  500 
52-14-0  Figure 502 (Sheet 1)  May 15/68 
Page 506 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

500  Aft Airstair Adjustment 
May 15/68  Figure 502 (Sheet 2)  52-14-0 
Page 507 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

CAUTION: DO NOT EXCEED 4.50 INCHES WHILE POSITIONING STAIRS.
NOTE:  A block should be installed under the lower inboard edge of the stairs to maintain the above dimension. The control handle should be latched.
(3)  
Position door carriage (2) in tracks (4) to obtain 0.27 (+0.01/-0.01) inches between carriage roller (3) and end of carriage track (4). (See detail A.)

NOTE:  A locally fabricated shim or spacer may be temporarily inserted between roller and end of track to maintain the above dimension.

(4)  
Adjust carriage control pushrods (1) to match door carriage (2) and reconnect pushrods.

(5)  
Extend airstair by pushing it out and allowing it to just completely unfold (115 degrees from the fully closed position). Hold in this position by supporting through the program arm torque tube.

(6)  
Install and adjust segment hook cams (2) to obtain 0.56 (+0.02/-0.02) inches between end of segment hooks (1) and bearing (3) centerlines. (See figure 503, detail A.)

(7)  
Continue rotation of airstair and check that segment hooks are fully latched.

(8)  
Retract airstair to its fully retracted position. After airstair is retracted, move the control handle to the unlatched position to withdraw the latch pin.

(9)  
Install preadjusted entry door. Refer to Aft Entry Door and Airstair, Removal/Installation.

(10)
Manually retract and extend airstair and check for proper operation of segment hooks.

(11)
Install return cam and adjust emergency extension mechanism. Refer to 52-14-21, Emergency Extension Mechanism.

(12)
Electrically or manually extend airstair. With console handle in unlatched position, check for 0.06 minimum gap between crank and bellcrank on the console. (See figure 504,  detail A.)

(13)
Test aft entry door and airstair.

(14)
Install carry-on baggage compartment on forward side of entry door. Refer to Carry-On Baggage Compartment, Chapter 25.

500 
52-14-0 Page 508  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  May 15/71 

500  Aft Airstair Segment Hook Adjustment 
May 15/68  Figure 503  52-14-0 
Page 509 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

Aft Airstair Control Console  500 
52-14-0Page 510   Figure 504 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Feb 15/81 

3.  Aft Entry Door and Airstair Test
A.  General
(1)  Prior to testing the mechanical and electrical operation of the door and airstair, the following conditions are assumed to have been complied with:
(a)  
The aft entry door, airstair operating mechanism, and airstair have been properly installed and rigged.

(b)  
The airstair has been manually-operated through a complete cycle and returned to the retracted position.

(c)  
The desired form of electrical power is available on the airplane.

B.  Prepare for Aft Entry Door and Airstair Test
(1)  
Check that airplane is level within 0 to 2 degrees nosedown and 1 degree maximum wing up or down.

(2)  
Check that distance between ground line and upper surface of top step at aft entry door location is 107.7 + 7.0/-10.0 inches.

CAUTION:  TESTING OF AFT ENTRY DOOR AND AIRSTAIR SHOULD NOT BE PERFORMED WITH AIRPLANE IN JACKED POSITION WITHOUT PROVIDING A SUPPORT FOR LOWER END OF AFT AIRSTAIR IN ITS FULLY EXTENDED POSITION.

(3)  
Check that exterior control handle is stowed and flush with handle housing. 

(4)  
Test centrifugal governor. Refer to 52-14-61, Adjustment/Test.

(5)  
Retract airstair fully and latch aft entry door.

(6)  
Remove electrical power from aft airstair system.

500 
May 1/76  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  52-14-0 Page 511 

C.  Test Aft Entry Door and Airstair
　
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