747-400 AMM 飞机维护手册 EXHAUST 1(20)

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 (a)  Cut a piece of seal material that is the same length as the missing seal.
 NOTE: You can have a maximum distance of 0.020 inch (0.51 mm)
____ between the ends of the splice piece and the adjacent seal.
 (b)  
Use a clean, dry cheesecloth to remove the unwanted material from the splice piece.

 (c)  
Put the splice piece in its position on the thrust reverser.

 (d)  
Do these steps to install the splice piece:

 1)  Cut two pieces of the fiberglass cloth with a width of 0.50 inch (12.7 mm) and a length of 1.0 inch (25.4 mm).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 
A 
SEE  A  B  FWD 
B 
(RIGHT HALF EQUIVALENT) THRUST REVERSER - LEFT HALF A 
SEALS  SEALS BLADE VERTICAL  1 SEALS 

SEALS BLADE VERTICAL 
A-A  1 SEALS  BIFURCATION UPPER  SEALS 
LOWER BIFURCATION 
1  SEAL EXTENDS AROUND CIRCUMFERENCE OF FAN COWL Vertical Blade Seal Installation Figure 802  B-B 

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
2) Apply a thin layer of the adhesive to the cut ends of the splice piece and the ends of the blade seal. 3) Put the pieces of the fiberglass cloth on the cut ends of the splice piece and the vertical blade seal. 4) Make sure the fiberglass cloth extends 0.45 to 0.55 inch
 (11.4 to 14.9 mm) on the end of the splice piece and must be on the end of the vertical blade seal. 5) Apply adhesive in the open areas between the splice piece and vertical blade seal to make a smooth contour. 6) Make sure the adhesive is aligned with the vertical blade
 seal at the surface which is sealed. 7) Use a clean, dry cloth to remove the unwanted adhesive. 8) Do not touch the seal for a minimum of 24 hours.
 G. Put the Airplane Back to its Usual Condition
 S 418-028-N00
 WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO CLOSE THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
 (1)  
Close the thrust reversers (AMM 78-31-00/201).

 S 418-029-N00

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

 S 418-031-N00

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

 S 448-030-N00

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

 TASK 78-00-00-358-032-N00
 4.  Repair the Bullnose Seal________________________
 A. Consumable Materials
 (1)  A00303 Adhesive - RTV 174 or
 A00087 Adhesive - RTV 102, General Electric

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(2)  
G00033 Cheesecloth - BMS 15-5B, Woven Class A

 (3)  
B00083 Solvent - TT-N-95, Type 2, aliphatic naphtha

 (4)  
G02276 Fabric, Dacron, D-2000

 (5)  
G00380 Abrasive Paper, Aluminum Oxide, 320 grit

 B.
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 System

 (4)  
AMM 78-31-10/401, Thrust Reverser Sleeve

 C.
Access

 (1)  
Location Zone
 415 and 416 Engine 1 - Thrust Reverser Halves
 425 and 426 Engine 2 - Thrust Reverser Halves
　
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