B.  
Access

 (1)  
Access Panel 211AL Panel, Access - Door Maintenance (Door 1, LH) 831L Door - No. 1 Main Entry, LH

 C.  
Procedure

 S 016-028
 (1)  
Open the door.

 (a)  
Look at the lower surface of the lower gate, and the top surface of the upper gate for corrosion (Section A-A, Fig. 602).

 (b)  
Make sure the wear pads for the stop pins on the lower gate are not worn more than 0.035 inch.

 TASK 52-11-01-206-030
 4.  Main Entry Doors 1-4 Internal and External Handle Mechanism Inspection/Check____________________________________________________________________________ (Fig. 601)
 A.  General
 (1)  
This is a scheduled maintenance task.

 B.  
References

 (1)  
52-11-02/401, Main Entry Door Lining and Insulation

 C.  
Access

 (1)  
Access Panel 211AL Panel, Access - Door Maintenance (Door 1, LH) 831L Door - No. 1 Main Entry, LH

 D.  
Examine the Main Entry Door (Door)

 (1)  
Open the door.

 S 016-016
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 52-11-01
 ALL  ú ú 06 Page 607 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
 (2)  S 016-017Remove the lining from the door (Ref 52-11-02/401).
 (3)  S 016-018Remove the door maintenance access panel, forward of the door.
 (4)  S 216-019Examine the door for corrosion (Fig. 601). (a) Look at the components that follow for cracks, corrosion, loose bolts, and the general condition: 1) The operational mechanism for the door 2) The door torque tube 3) The body torque tube 4) All bearings 5) All attachments.
 (5)  S 416-024Install the door maintenance access panel forward of the door.
 (6)  S 416-025Install the lining on the door (Ref 52-11-02/401).

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 52-11-01
 ALL  ú ú 05 Page 608 ú Oct 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 MAIN ENTRY DOOR LINING AND INSULATION - REMOVAL/INSTALLATION
____________________________________________________________
 1.  General
________
 A.  This procedure has two tasks:
 (1)  
The first task is the removal of the main entry door lining.

 (2)  
The second task is the installation of the main entry door lining.

 B.  
The main entry door lining has three sections: the upper section, the center section and lower section.

 TASK 52-11-02-004-002-002
 2.  Entry Door Lining Removal (Fig. 401)
_________________________
 A.  Standard Tools and Equipment
 (1)
Spanner Wrench - Assist Handle, Main Entry Door - F70336-1

 B.  
Access

 (1)  
Access Panels
 831L Door - No. 1 Main Entry, LH
 835L Door - No. 5 Main Entry, LH

 C.  
Procedure

 S 024-003-002
 (1)  
For the upper or the lower lining, do this step:

 (a)  
Remove the screws, washers and nuts and remove lining.

 S 024-004-002
 (2)  
For the center lining, do these steps:

 (a)  
Remove the interior handle (section C-C). 1) Loosen the two retainer plugs from the internal handle to get access to handle pin. 2) Remove the handle pin from the handle with an applicable

 drift. 3) Remove the handle from stub shaft.

 (b)  
Remove the assist handle (section D-D). 1) Turn the handle nuts clockwise with the spanner wrench to remove the handle.

 2)  Remove the attachment screws, washers, spacers and shims and remove the handle nuts.

 (c)  
Remove the screws, washers and nuts which attach the lining to the support and remove the lining.

 TASK 52-11-02-404-001-002
 3.  Entry Door Lining Installation (Fig. 401)
　
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