nut before you slide the fuse pin (55) to its fully engaged position.
(e)
Do a check of the self-locking torque of the BACN10JC24CD or 310U2100-34 nut. 1) If the self-locking torque is not 350-1250 pound-inches
(39.5-142.5 N.m), replace the nut.
NOTE: The torque wrench must be installed on the nut
____ and not the head of the bolt.
(f)
Tighten the nut (48) to 3200-3800 pound-inches (361.5-429.3 N.m). 1) Do a check to make sure that the torque value is correct.
(g)
Install the end cap (54) with the bolt (53) and two washers (49 and 52).
(h)
Install the nut (51) on the bolt (53) and tighten with your hand. 1) Make sure that the washer (49) is correctly seated on the
end of the fuse pin (55), and the nut (51) is correctly seated on the washer (49).
(i)
Install the cotter pin (50).
1) Tighten the nut (51) 50-200 pound-inches to align the hole for the cotter pin (50). a) You can install a maximum of three adjustment washers,
between the nut (51) and the washer (49), to align the hole for the cotter pin (50). 2) Do a check to make sure that the bolt, end cap, nut, washers, 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.
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ALL ú CONFIG 3 ú 10N Page 432 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(j)
(k)
(l)
(m)
(n)
(o)
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747-400 MAINTENANCE MANUAL
Apply a torque stripe on the fuse pin primary nut and the fuse
pin threads with seal marking lacquer.
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 washer (47)
____ and the bushing flange of the midspar/spring beam and/or the fuse pin (55) and the bushing flange of the midspar/spring beam.
Inject grease into the grease fitting, if installed, until
grease appears around edge of the pin.
1) Remove excess grease from around the pin.
Make sure the clearance between the midspar/spring beam
fittings and the wing fittings is as shown on the illustration.
1) Make the gaps on each side approximately equal.
Do a check for clearance between midspar/springbeam pin
nut/washer and the EDP hydraulic supply tube.
1) On inboard struts, the clearance must be 0.15 inch or
greater between EDP hydraulic supply tube and the nearest part of the nut or washer.
2) On outboard struts, the clearance must be 0.25 inch or greater between the EDP hydraulic supply tube and the nearest part of the nut or washer.
3) If clearance minimums cannot be met: a) Depressurize the hydraulic reservoir (AMM 29-11-00) b) Install/splice a new hydraulic tube (AMM 20-11-05) c) Repressurize the hydraulic reservoir (AMM 29-11-00 or
operator equivalent) d) Do the EDP test (AMM 29-11-05 or operator equivalent) e) Do a check of the new/spliced tube for leaks (AMM
29-11-00 or operator equivalent)If the engine is removed, and the nacelle strut has not been removed from the wing, do these steps: 1) Slowly release the load on the overhead sling and remove
the sling.
WARNING: ONLY PERSONNEL INSTRUCTED IN PROPER USAGE SHOULD
_______ OPERATE HOISTS.
MAKE SURE YOU OBEY ALL SAFETY PRECAUTIONS FOR OVERHEAD MECHANICAL EQUIPMENT OR DAMAGE TO THE AIRPLANE OR INJURY TO PERSONNEL CAN OCCUR.
2) Use the tool placard to install the diagonal brace preload sling (Fig. 401). 3) Do the procedure to install the diagonal brace fuse pin/bolt that was removed.
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ALL ú CONFIG 3 ú 10N Page 433 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
S 424-012-003
(2) Install the upper link aft attach bolt.
(a) If you install different parts than you removed, do this check to find the correct number of adjustment washers:
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