747-400 AMM 飞机维护手册 发动机 ENGINE 2(48)

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(b)  ENGINES PRE-PW-SB 72-107; Remove the 14 screws that attach the inner liner and the spacer plate to the fan exit case.
 NOTE: These are at the top, bottom, aft, and forward center
____ locations. Do not remove the screws from the forward edge of the No. 4 liner segment. There are no forward center screws on the liner segment No. 4.
 (c)  ENGINES POST-PW-SB 72-107; Remove the 14 bolts that attach the inner liner and the spacer plate to the fan exit case.
 NOTE: These are at the top, bottom, aft, and forward center
____ locations. Do not remove the bolts from the forward edge of the No. 4 liner segment. There are no forward center bolts on the liner segment No. 4.
 (d)  Carefully remove the liner and spacer plate from the case.
 NOTE: Zero to three classified washers, washers with specified
____ thicknesses, were possibly installed between the liner and the front center attachment bracket to keep the correct clearance. If these washers were used, they were attached to the bracket with some adhesive compound. When the engine operates or you install or remove the liner segments, the washers can become disconnected from the bracket.
 (e)  
Remove the sealant, if necessary, from the axial edge of the liner segment and its mating parts.

 (f)  
ENGINES PRE PW SB 72-519; Keep the spacer with the liner segment, when the liner segment is not attached to the fan exit case.

 TASK 72-34-03-404-030-N00
 3.  Install the Fan Exit Liner Segment that You Removed (Inner Rear)________________________________________________________________
 A. Consumable Materials
 (1)  
D00137 Engine Oil - PWA 521B

 (2)  
G00033 Cheesecloth - Unsized

 (3)
C00317 Sealant - Flame Resistant Silicone Rubber, (PWA 3675-1)

 (4)  
B00130 Alcohol - Isopropyl (PMC 9094)

 (5)  
A00160 Primer - Silicone (PWA 36086-2)

 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

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 72-34-03
 ALL  ú ú N01 Page 408 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
C. Access
 (1)  
Location Zone
 412 Engine 1 - Intermediate Case
 422 Engine 2 - Intermediate Case
 432 Engine 3 - Intermediate Case
 442 Engine 4 - Intermediate Case

 (2)  
Access Panel
 415 Left Thrust Reverser Half - Engine 1
 416 Right Thrust Reverser Half - Engine 1
 425 Left Thrust Reverser Half - Engine 2
 426 Right Thrust Reverser Half - Engine 2
 435 Left Thrust Reverser Half - Engine 3
 436 Right Thrust Reverser Half - Engine 3
 445 Left Thrust Reverser Half - Engine 4
 446 Right Thrust Reverser Half - Engine 4

 D.
Install the fan exit liner segments.

 S 424-031-N00
 CAUTION: BE VERY CAREFUL WHEN YOU REMOVE OR INSTALL A LINER SEGMENT.
_______ THE WASHERS THAT ARE ATTACHED TO THE FRONT LINER BRACKET CAN BECOME DISCONNECTED FROM THE BRACKET. ALSO, IF THE EDGE OF THE LINER SEGMENT HITS SOMETHING, IT CAN CAUSE DELAMINATION.
 (1) Do the steps that follow to install the liner segments (Fig. 402).
 NOTE: ENGINES PRE-PW-SB 72-107 use screws, and ENGINES
____
 POST-PW-SB 72-107 use bolts.

 NOTE: ENGINES POST PW SB 72-519 do not use spacers.
____
 NOTE: The 6 o'clock liner does not use bolts or screws at the
____
 leading edge.

 (a)  
Install two screws/bolts, threads lubricated with engine oil, to holes in the leading edge of the liner segment.

 (b)  
Put the liner segment in the correct position on the case.

 (c)  
Tighten the screws/bolts with your hand.

 (d)  
ENGINES PRE-PW-SB 72-519; If the spacer is loose, put it in the correct position at the trailing edge.

 (e)  
Install screws/bolts, threads lubricated with engine oil, in the trailing and axial edges of the liner segments. 1) Tighten the screws/bolts with your hand.

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