71-11-08
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 024-006-N00
 (5)
Remove the hinge assemblies and the washers.

 S 034-007-N00

 (6)
Remove the bushings that are worn.

 TASK 71-11-08-404-008-N00
 3. Pressure Relief Door Installation (Fig. 401)
_________________________________
 A. Consumable Materials
 (1)
D00015 Grease - Corrosion Preventive BMS 3-24 (Ref 20-30-04)

 B.
References

 (1)
AMM 71-11-08/501, Cowl Panel Pressure Relief Doors

 (2)
AMM 78-31-00/201, Thrust Reverser System

 (3)
IPC 71-11-08 Fig. 1

 C.
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

 D.
Procedure

 S 434-009-N00
 (1)
Install the bushings.

 (2)
Install the hinge assemblies in the bushings.

 S 434-010-N00
 NOTE: Use washers, if it is necessary, to make sure the door is in
____ the limits for the aerodynamic smoothness.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(3)  S 424-011-N00Align the door with the holes for the roll pins in the hinge assemblies.
 (4)  S 434-012-N00Install the roll pins on the inner side of the door with a drift punch. (a) Make sure the roll pins make the smooth surface with the outer surface of the cowl.
 (5)  S 644-013-N00Apply the grease to the bolts that attach the hinge assemblies to the door.
 (6)  S 434-014-N00Install the bolts, the nuts, and the washers that attach the hinge assemblies to the door.
 (7)  S 824-015-N00Adjust the latches and the hinges on the door (AMM 71-11-08/501).
 (8)  S 414-016-N00Close the door.
 (9)  S 444-017-N00Do the activation procedure for the thrust reverser (AMM 78-31-00/201).

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
COWL PANEL PRESSURE RELIEF DOORS - ADJUSTMENT/TEST
__________________________________________________
 1.  General
_______
 A.  There are two tasks in this procedure. The first task is used to do a latch test for the pressure relief doors. Ths second task is used to do an adjustment of the aerodynamic smoothness for the pressure relief doors.
 (1)  
The latch test is used to make sure the latches release at the correct pressure. To do this test, you apply a load to the latches.

 (2)  
The adjustment of the aerodynamic smoothness is used to make sure the pressure relief door is in the correct tolerances.

 TASK 71-11-08-705-001-N00
 2.  Latch Test for the Cowl Panel Pressure Relief Doors
___________________________________________________
 A.  Equipment
 (1)  
Adapter - Load Test - Pressure Relief Door
 Latch - B71044-10

 B.  
References

 (1)  
AMM 78-31-00/201, Thrust Reverser System

 C.  
Access

 (1)  
Location Zone
 413 and 414 Fan Cowl Panel - Engine 1
　
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