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54-51-02
ALL ú CONFIG 3 ú 10N Page 435 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
(h)
Install the nut (30) on the bolt (28) and tighten with your hand. 1) Make sure the washer (32) is correctly seated on the end of
the fuse pin (26), and the nut (30) is correctly seated on the washer (32).
(i)
Install the cotter pin (31).
1) Tighten the nut (30) to 50-200 pound-inches to align the hole for the cotter pin (31). a) You can install a maximum of three adjustment washers,
between the nut (30) and the washer (32), to align the hole for the cotter pin (31). 2) Do a check to make sure that the bolt, end cap, washers, nut, and cotter pin are installed correctly. 3) Apply sealant, approximately 0.10 inch (2.54 mm) thick, to both ends of the cotter pin to prevent cotter pin movement.
(j) Make sure the joint is not clamped.
1) A minimum gap of 0.010 inch (0.255 mm) is required in the joint.
NOTE: The gap may be located between the fuse pin (26)
____ and the bushing flange of the strut fitting and/or the washer (34) and the bushing flange of the strut fitting.
(k) Inject grease into grease fitting, if installed, until grease appears around edge of the pin. 1) Remove excess grease from around the pin.
S 424-014-003
(4) Install the side link assembly.
NOTE:____There are two pairs of side links for each strut. The installation is the same for each pair.
(a)
If the side link assembly was removed, make sure you install the side link assembly that was identified for this airplane and strut location.
(b)
If the side link assembly is new, do these steps:
1) Make sure the clearance between the midspar/spring beam fittings and the wing fittings is as shown on the illustrations.
2) Use the MIT SM321U2750 locating tool to determine the required distance between pin centers, from the wing fitting to the strut side load fitting, with no load applied to the strut.
3) Adjust the new side link assembly to match the measured distance as follows: a) Install the eccentric bushings into the links with wet
sealant.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
54-51-02
ALL ú CONFIG 3 ú 10N Page 436 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
b) Rotate the eccentric bushings in the links to adjust the bushing center-to-center distances to the measured value.
NOTE: The hole center in the eccentric bushing is
____ to be located so that after installation the link is in the lower of the two possible positions.
c) Install the retainer keys. 1 Drill the fastener hole for each retainer key.
_ NOTE: The retainer can be turned over at assembly
____ to allow 30 degrees of rotation and to ensure a minimum edge margin of 0.40 inch
(10.16 mm) at fastener installation.
2 Install each retainer key with the fastener.
_
d) Tag the side link assembly with the bore center-to-center distance, basic airplane number, and strut location, or make sure this data is marked on the side link assembly. Apply a thin enamel overcoat over the tag data.
(c) Install the side link (upper) attach bolt. 1) Apply a thin layer of grease to the bolt (40). 2) Install the bolt (40), four washers (41, 42, 43, and 44),
and nut (45).
NOTE: The bolt head direction is optional.
____
a) Tighten the nut (45) to 1500-2000 pound-inches (171.0-228.1 N.m). 1 Do a check to make sure that the torque value is
_
correct.
3) Install the cotter pin (46).
a) You can install a maximum of three adjustment washers, between the nut (45) and the washer (44), to align the hole for the cotter pin (46).
b) Do a check to make sure that the bolt, washers, nut, and cotter pin are installed correctly.
c) Apply sealant, approximately 0.10 inch (2.54 mm) thick, to both ends of the cotter pin to prevent cotter pin movement.
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本文链接地址：747-400 AMM 飞机维护手册 NACELLES/PYLONS(33)
