747-400 AMM 飞机维护手册 发动机 ENGINE 2(74)

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 (b) Find the positions of the new holes as follows: 1) Attach a replacement access cover(s) and a cover plate to the inner fairing with bolts at the positions shown in Figure 801.
 2) Make a mark on the centerlines of all the hole diameters.
 3) Remove the work bolts that were installed.
 4) Remove the cover plate.
 5) Remove the access covers.

 (c) Install the bolt holes at the positions that were marked.
 (d) Apply the sealant to the machined surfaces of the cover(s) as follows: 1) Clean the machined surfaces of the fairings and the cover(s) with a solution of water and Wetting Agent. 2) Fully flush the machined surfaces with clean water. 3) Dry the machined surfaces fully in air that is at ambient
 temperature. 4) Mix together, in a 4:1 proportion, Resin and Curing Agent. 5) Apply the epoxy mixture to the machined surfaces.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
6)  Make sure the epoxy mixture is cured at 175°F (79.4°C) for one hour, minimum.
 (e)  Bond the washers to the bolt holes. 1) Clean the bond area of the bolt holes with Cheesecloth that
 is wet with Solvent. 2) Dry the surfaces in air that is at ambient temperature.
 NOTE: Make sure that it is for a sufficient length of time
____ to remove all signs of the solvent.
 3) Clean the bond area of the washers with Alcohol. 4) Apply a constant layer of Epoxy to each bond area of the access cover(s).
 NOTE: Make sure you apply the epoxy in less than 30
____ minutes after you cleaned the access covers.
 5) Bond the washers to the access cover(s). 6) Make sure the epoxy is cured at ambient temperature for two hours, minimum.
 F.  Put the Airplane Back to Its Usual Condition.
 S 418-008-N00
 WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO CLOSE THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (1)  
Close the thrust reversers (AMM 78-31-00/201).

 S 418-011-N00

 (2)  
Close the core cowl panels (AMM 71-11-06/201).

 S 418-010-N00

 (3)  
Close the fan cowl panels (AMM 71-11-04/201).

 S 448-009-N00

 (4)  
Do the activation procedure for the thrust reversers
 (AMM 78-31-00/201).

 S 448-012-N00

 (5)  
Remove the DO-NOT-OPERATE tag from the ENG START switch on the P5 panel.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
COMPRESSOR INTERMEDIATE CASE FAIRINGS - REMOVAL/INSTALLATION
____________________________________________________________
 1.  General
_______
 A.  This procedure gives the tasks to remove and install the (compressor) intermediate case fairings. This procedure task includes the instructions to make rivet holes in the new fairing if you replace the old one. This procedure does not change the number of rivet holes in the strut.
 B.  In this procedure the (compressor) intermediate case fairings will be called the intermediate case fairings.
 C.  The intermediate case fairings are aft of the fan case vanes. On the intermediate case there are eight (8) struts that have two (2) fairings each.
 D.  You can open each half of the thrust reverser to get access to the intermediate case fairings.
 TASK 72-34-05-004-005-N00
 2.  Remove An Intermediate Case Fairing
___________________________________
 A.  References
 (1)  
AMM 71-11-04/201, Fan Cowl Panels

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

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

 B.  
Access

 (1)  
Location Zone
 412 Engine 1 - LPC Intermediate Case
 422 Engine 2 - LPC Intermediate Case
　
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