S 494-055
(11)
Install the sling
(a)
Find the lift point for the inboard or outboard strut.
(b)
Use the attach fitting on the forward hoisting to attach the sling to the front of the strut.
(c)
Use the attach fittings on the aft hoisting to attach the sling to the sides of the strut.
(d)
Carefully lift the strut with the crane.
S 424-056
(12) Put the strut in the correct position for installation on the wing.
G. Install the Nacelle Strut (Fig. 403)
S 434-057
(1) Install the two fuse pins of the midspar/spring beam
(AMM 54-51-02/401).
S 434-136
CAUTION: ON THE OUTBOARD STRUTS, MAKE SURE YOU INSTALL AN UPPER LINK AND
_______ DIAGONAL BRACE IN THEIR CORRECT PAIRS. THE PAIRS CAN BE A TITAMIUM UPPER LINK AND DIAGONAL BRACE OR A STEEL UPPER LINK AND ALUMINUM DIAGONAL BRACE. ALSO, MAKE SURE YOU ATTACH THE CORRECT SYSTEMS HARDWARE FOR THE TYPE OF MATERIAL IN THE UPPER LINK AND DIAGONAL BRACE. IF YOU DO NOT INSTALL THE CORRECT PARTS, YOU CAN CAUSE DAMAGE TO THE AIRPLANE.
(2) Put the upper link between the wing and strut attach fitting.
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747-400 MAINTENANCE MANUAL
(3) S 434-059Install the aft attach bolt of the upper link (AMM 54-51-02/401).
(4) S 434-060Install the forward fuse pin of the upper link (AMM 54-51-02/401).
(5) S 434-061Put the side brace between the wing attach fitting and strut attach fitting.
(6) S 434-062Install the attach bolts of the side brace (AMM 54-51-02/401).
S 434-137
CAUTION: ON THE OUTBOARD STRUTS, MAKE SURE YOU INSTALL AN UPPER LINK AND
_______ DIAGONAL BRACE IN THEIR CORRECT PAIRS. THE PAIRS CAN BE A TITAMIUM UPPER LINK AND DIAGONAL BRACE OR A STEEL UPPER LINK AND ALUMINUM DIAGONAL BRACE. ALSO, MAKE SURE YOU ATTACH THE CORRECT SYSTEMS HARDWARE FOR THE TYPE OF MATERIAL IN THE UPPER LINK AND DIAGONAL BRACE. IF YOU DO NOT INSTALL THE CORRECT PARTS, YOU CAN CAUSE DAMAGE TO THE AIRPLANE.
(7)
Put the diagonal brace between the wing attach fitting and strut attach fitting.
S 434-064
(8)
Install the aft fuse pin of the diagonal brace (AMM 54-51-02/401).
S 094-147
(9)
Slowly release the load on the overhead sling and remove the sling.
S 414-152
(10)
Install the No. 3 forward fairing.
S 494-148
(11)
Use the tool placard to install the strut preload sling G54007 (Fig. 402).
S 984-149
CAUTION: DO NOT EXCEED THE LOAD NECESSARY TO PERMIT PIN INSTALLATION.
_______ IN NO CASE SHALL THE MAXIMUM UPLOAD OR DOWNLOAD AT THE FORWARD ENGINE MOUNT OF THE STRUT EXCEED 3,000 POUNDS OF FORCE ON THE INBOARD STRUTS OR 1,800 POUNDS OF FORCE ON THE OUTBOARD STRUTS. IF YOU APPLY A FORCE THAT IS MORE THAN NECESSARY, DAMAGE TO THE STRUCTURE CAN OCCUR.
(12) Gently apply a load sufficient to install the pin at the forward end of the diagonal brace.
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S 434-115
(13)
Install the forward fuse pin of the diagonal brace
(AMM 54-51-02/401).
S 094-138
(14)
Slowly release the load on the diagonal brace preload sling and remove the sling.
S 224-066
(15)
On outboard struts, do a check on the rotational torque of the bearing bolt on the spring beam (AMM 54-51-03/601).
H. Put the Airplane to Its Usual Condition (Fig. 401 and 402)
S 434-068
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