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 relief door.
 (c)  Make sure that the surface of the door is aligned with the surface of the cowl panel.
 NOTE: The difference must be |0.03 inch (|0.76 mm).
____
 1) If the pressure relief door does not align, do these steps:
 a) Remove the pressure relief door.
 b) Remove the roll pins to disassemble the hinge assembly.
 c) To change the thickness of the shims, remove the
 laminations or replace the shim with a thicker shim.
 NOTE: New shims must be drilled for the roll pins
____ and the bolts.
 d) Apply a primer to the shims where they touch. 2) Assemble the hinge assembly. 3) Install the hinge assembly on the pressure relief door.
 S 445-008-N00
 (3) Do the Thrust Reverser Activation procedure (AMM 78-31-00/201).
 TASK 71-11-08-825-013-N00
 4. Adjustment - Upper and Lower Side of the Cowl Panel Pressure Relief Door
________________________________________________________________________
 A. References
 (1)  AMM 78-31-00/201, Thrust Reverser System
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 71-11-08
 ALL  ú ú N01 Page 509 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
B. Access
 (1)  
Location Zone
 413 and 414 Fan Cowl Panel - Engine 1
 423 and 424 Fan Cowl Panel - Engine 2
 433 and 434 Fan Cowl Panel - Engine 3
 443 and 444 Fan Cowl Panel - Engine 4
 417 and 418 Core Cowl Panel - Engine 1
 427 and 428 Core Cowl Panel - Engine 2
 437 and 438 Core Cowl Panel - Engine 3
 447 and 448 Core Cowl Panel - Engine 4

 C.
Procedure (Fig. 501)

 S 045-014-N00
 WARNING: DO THE DEACTIVATION PROCEDURE FOR THE THRUST REVERSERS TO
_______ PREVENT THE OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (1)  
Do this procedure: Thrust Reverser Deactivation for Ground
 Maintenance (AMM 78-31-00/201).

 S 215-011-N00

 (2)  
Do a check of adjustment of the clearance on the upper and lower side of the pressure relief door.

 (a)  Make sure that the upper and lower side clearances are 0.03-0.09 inch (0.74-2.26 mm). 1) If the clearance does not agree with the given tolerance,
 remove or install the washers between the hinge assemblies and bushings.
 S 445-016-N00
 (3)  Do this procedure: Thrust Reverser Activation After Ground
 Maintenance (AMM 78-31-00/201).

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 71-11-08
 ALL  ú ú N01 Page 510 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
COWL PANEL HOLD-OPEN ROD - MAINTENANCE PRACTICES
________________________________________________
 1.  General
_______
 A.  There are two tasks in this procedure. The first task does an inspection of the hold-open rods for the fan cowls, the thrust reversers, and the core cowls. The second task is used to clean the hold-open rods.
 B.  The hold-open rods hold the cowl panels in the open position. One end of the rods is attached to the cowl panel with a bolt. The other end of the rods attaches to a stow bracket on the cowl panel when the cowl is closed. When the cowl panel is open, one end of the rods attach to a bracket on the engine.
 C.  The hold-open rods must lock when they are fully extended. It is important to make sure the hold-open rods and the lock mechanisms operate correctly.
 TASK 71-11-10-102-017-N00
 2.  Cowl Panel Hold-Open Rod - Inspection/Check (Fig. 201)
___________________________________________
 A.  References
 (1)
AMM 71-11-04/201, Fan Cowl Panel

 (2)
AMM 71-11-06/201, Core Cowl Panel

 (3)
AMM 78-31-00/201, Thrust Reversers

 B.  
Access

 (1)  
Location Zone 413 and 414 Fan Cowl Panel - Engine 1 423 and 424 Fan Cowl Panel - Engine 2 433 and 434 Fan Cowl Panel - Engine 3 443 and 444 Fan Cowl Panel - Engine 4 415 and 416 Thrust Reverser Halves - Engine 1 425 and 426 Thrust Reverser Halves - Engine 2 435 and 436 Thrust Reverser Halves - Engine 3 445 and 446 Thrust Reverser Halves - Engine 4 417 and 418 Core Cowl Panel - Engine 1 427 and 428 Core Cowl Panel - Engine 2 437 and 438 Core Cowl Panel - Engine 3 447 and 448 Core Cowl Panel - Engine 4
　
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