(c)
Apply the sealant to the washers and the bracket.
(d)
Use screws/bolts to temporarily hold the washers in the correct position.
(e)
Do those steps again to attach all of the washers for the
remaining liner segments.
S 974-044-N00
(3) ENGINES PRE-PW-SB 72-519; Find the correct class of spacer from Table II that will make the distance between the surface of the liner segment not more than
0.020 inches (0.508 mm) from the level of the strut platform.
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72-34-03
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
~...........................................
| Spacer - Thickness |
| (PRE-PW-SB 72-519) |
| Table II |
.............................................
| Class | Washer Thickness - Inch (mm) |
.............................................
| 1 | 0.022-0.028 (0.559-0.711) |
.............................................
| 2 | 0.036-0.044 (0.914-1.118) |
.............................................
| 3 | 0.058-0.068 (1.473-1.727) |
.............................................
| 4 | 0.075-0.085 (1.905-2.159) |
.............................................
| 5 | 0.095-0.105 (2.413-2.667) |
.............................................
| 6 | 0.120-0.130 (3.048-3.302) |
2.........….................................1
(a) If necessary, replace the spacer that is now installed on the case, as follows: 1) ENGINES PRE-PW-SB 72-519;
Remove the adhesive transfer tape, if necessary, and the spacer from the case.
NOTE: It is possible that the spacer is bonded to the
____ V-groove rail (fan exit case flange assembly) with adhesive transfer tape.
2) ENGINES PRE-PW-SB 72-519; Prepare the spacer and V-groove rail for the installation for the tape as follows: a) With a clean cheese cloth that is moist with alcohol,
clean the areas you will bond.
b) Dry the surfaces fully in air that is at ambient temperature, until there is no more alcohol on the parts.
3) Install Tape on the V-groove rail or on the spacer.
4) Remove the tape from the bolt holes.
5) Align the holes of the V-groove rail and the spacer.
6) Install the spacer on the V-groove rail.
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72-34-03
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
S 394-045-N00
(4) ENGINES PRE-PW-SB 72-519; Apply sealant to the space on the V-groove rail between the spacer and the flange of the strut as follows:
NOTE: This step is not necessary if you install the same class
____
spacer as the one you removed.
(a)
ENGINES PRE-PW-SB 72-519; Mechanically remove any sealant that is in the space.
(b)
Prepare the V-groove rail as follows: 1) With a clean cheese cloth that is moist with alcohol, clean the areas you will bond.
2) Dry the surfaces fully in air that is at ambient temperature, until there is no more alcohol on the parts.
(c)
Apply sealant to the area.
(d)
Apply mold release to the liner segment in the same area.
F.
Install the fan exit liner segments.
S 424-046-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. 403).
NOTE: ENGINES PRE-PW-SB 72-107 and POST-PW-SB 72-519 use screws,
____ and ENGINES POST-PW-SB 72-107 use bolts. ENGINES POST-PW-SB 72-519 do not use the spacers.
(a)
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本文链接地址：747-400 AMM 飞机维护手册 发动机 ENGINE 2(52)
