(d)
STRUTS WITH SIDE LINKS; If the rotational torque after breakaway is 1200 pound-inches
(135.6 N.m) or less, the bolt and fitting are acceptable.
(e)
Install the cotter pin or retainer.
1) If cotter pin was removed, install the cotter pin and apply BMS 5-79 sealant, approximate thickness 0.10 inch (2.5 mm), to both ends of cotter pin to prevent cotter pin movement.
(f)
STRUTS WITH A SIDE BRACE; If rotational torque after breakaway is greater than 3000 pound-inches (342 N.m), inject liberal amount of grease into grease fitting and rotate bolt six revolutions or until rotational torque is 3000 pound-inches (342 N.m) or less.
(g)
STRUTS WITH SIDE LINKS; If rotational torque after breakaway is greater than 1200 pound-inches (135.6 N.m), inject liberal amount of grease into grease fitting and rotate bolt six revolutions or until rotational torque is 1200 pound-inches (135.6 N.m) or less.
(h)
STRUTS WITH A SIDE BRACE; If after rotating bolt six revolutions, rotational torque is greater than 3000 pound-inches (342 N.m), perform the following: 1) Loosen nut and drive bolt out approximately 1/32 inch
(0.8 mm) to free washers.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. OUTBOARD STRUTS ú
54-51-03
ú ú 02 Page 604 ú Oct 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
2) Inject grease into grease fitting and apply a torque to bolt head.
(i) STRUTS WITH SIDE LINKS; If after rotating bolt six revolutions, rotational torque is greater than 1200 pound-inches (135.6 N.m), perform the following: 1) Loosen nut and drive bolt out approximately 1/32 inch
(0.8 mm) to free washers. 2) Inject grease into grease fitting and apply a torque to bolt head.
3) STRUTS WITH A SIDE BRACE; If rotational torque is 3000 pound-inches (342 N.m) or less, bolt and fitting are acceptable.
4) STRUTS WITH SIDE LINKS; If rotational torque is 1200 pound-inches (135.6 N.m) or less, bolt and fitting are acceptable. a) Apply grease to washer faces and drive bolt back into
fitting to seat bolt head and washer. b) Install nut finger-tight ensuring that nut and washer are securely seated against fitting.
c) Install cotter pin. Tighten nut up to a maximum of 200 pound-inches (22.6 N.m) torque, if necessary, to line up nut slot with hole in bolt.
d) Apply sealant (approximate thickness 0.10 inch (2.5 mm) to both ends of cotter pin to prevent cotter pin movement.
5) STRUTS WITH A SIDE BRACE; If rotational torque is greater than 3000 pound-inches (342 N.m), remove bolt (AMM 54-51-03/401).
6) STRUTS WITH SIDE LINKS; If rotational torque is greater than 1200 pound-inches
(135.6 N.m), remove bolt (AMM 54-51-03/401). a) Check bolt OD, bushing, and bearing ID for galling. Replace if galled. b) Check washers for burrs and galling. Replace if necessary. c) Apply liberal amount of grease to all mating surfaces
and install bolt (AMM 54-51-03/401). d) Repeat bolt rotation check.
S 946-006
CAUTION: TOOLS, LOOSE MATERIAL, AND DEBRIS IN STRUT CAVITIES MAY
_______ BLOCK DRAINS, RENDERING DRAIN SYSTEM INEFFECTIVE.
(5)
Make sure that tools and loose material are removed and strut cavities are free of debris before installing access panels.
(6)
Install the wing leading edge cover.
S 416-007
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. OUTBOARD STRUTS ú
54-51-03
ú ú 02 Page 605 ú Oct 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 416-008
(7)
Install the spring beam bearing access panel and make sure that the lugs on door engage slots on bolthead.
S 416-009
(8)
Install the engine (AMM 71-00-02/401).
TASK 54-51-03-216-010
3. Spring Beam Bearing Movement Check (Fig. 601)__________________________________
A. References
(1) AMM 27-81-00/201 Leading Edge Flaps
B. Access
(1)
Location Zone
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機維護手冊 NACELLES/PYLONS(44)
