6. Install Power Plant (Fig. 405)
A. Mount engine support beams on engine forward and aft mount rings.
B. Install hoist equipment as specified in par. 4.T.
WARNING: TO PREVENT INJURY TO PERSONNEL OR DAMAGE TO EQUIPMENT DUE TO A LOAD CELL ASSEMBLY OR HOIST SLIPPING OUT, ENSURE THAT LOAD CELL ASSEMBLY OR HOIST IS IN THE LOCKED POSITION IN ENGINE HOIST RECEPTACLE.
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May 01/03 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 71-00 Page 415
C. Position engine transportation dolly with engine to be installed beneath engine mounts and attach hoist assemblies to engine support beams.
D. If using the Load Limiting System, adjust the load limiters on the hoists as follows: Inboard forward - 1900 pounds Outboard forward - 3000 pounds Inboard aft - 3000 pounds
E. Raise engine out of engine transportation dolly. Rotate outboard side upward so that engine horizontal centerline is at an angle of about 6 degrees with respect to ground.
WARNING: ENGINE WEIGHS APPROXIMATELY 5000 POUNDS WITH BEAMS. ENSURE THAT ENGINE SUPPORT ASSEMBLY IS ADJUSTED TO GIVE EVEN FORE AND AFT SUPPORT TO ENGINE. UNEVEN SUPPORT CAN CAUSE ENGINE TO SHIFT RESULTING IN INJURY TO PERSONNEL OR DAMAGE TO ENGINE AND/OR DAMAGE TO AIRFRAME.
F. Hoist engine as follows:
(1)
Operate chain hoists and slowly raise forward and aft end of engine evenly. Raise engine until outboard, inboard forward, and inboard aft mount cone bolts are approximately 1/4 inch from being seated without compressing engine firewall seals. Make measurement at aft mount cone bolt.
(2)
Connect thrust reverser hydraulic lines (Fig. 404).
NOTE: Removal of aft access panel 5140L or 5240R may facilitate in the disconnection or connection of thrust reverser hydraulic lines at disconnect fittings.
(3)
Slowly raise forward end of engine until forward cone bolts protrude through cone bolt fittings far enough to allow nuts to be fully threaded.
WARNING:
WARNING:
ENGINE WEIGHS APPROXIMATELY 5000 POUNDS WITH BEAMS. IF USING LOAD INDICATING SYSTEM, CHECK THAT FOLLOWING LOAD LIMITS ARE NOT EXCEEDED DURING ENGINE INSTALLATION:
INBOARD FORWARD 1900 POUNDS
INBOARD AFT 3000 POUNDS
OUTBOARD 3000 POUNDS
EXCEEDING THE LIMITS MAY IMPOSE UNDUE STRESS ON AIRFRAMES, ENGINE, AND HOISTING EQUIPMENT. THIS TYPE OF CONDITION COULD RESULT IN DAMAGE TO EQUIPMENT AND/OR AIRFRAME AND SERIOUS INJURY TO PERSONNEL. IF LIMITS ARE INADVERTENTLY EXCEEDED, CHECK FORWARD AND AFT ENGINE MOUNTS INCLUDING HOIST RINGS ATTACH FITTINGS AND RELATED WING SUPPORT STRUCTURE FOR EVIDENCE OF LOOSE FASTENERS, NICKS, CRACKS, GOUGES, CHIPPED FINISH AND/OR SIGNS OF VISIBLE DAMAGE.
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71-00 Page 416 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Feb 01/96
(4)
Remove thread protectors from forward cone bolts and apply light coat of Ease-Off 990 to threads and both sides of washers. Application of Ease-Off 990 will not change torque applied to cone bolt nuts.
(5)
Install washers and fully thread nuts on forward cone bolts.
(6)
Carefully slack off on forward hoist chains.
WARNING: FAILURE TO SLACK OFF FORWARD HOISTS PRIOR TO RAISING AFT END OF ENGINE MAY IMPOSE UNDUE STRESS ON AIRFRAME, ENGINE AND HOISTING EQUIPMENT. THIS TYPE OF CONDITION COULD RESULT IN DAMAGE TO EQUIPMENT OR AIRFRAME AND POSSIBLE INJURY TO PERSONNEL. IF THIS CONDITION OCCURS, CHECK FORWARD AND AFT ENGINE MOUNTS INCLUDING HOIST RINGS ATTACH FITTINGS AND RELATED WING SUPPORT STRUCTURE FOR EVIDENCE OF LOOSE FASTENERS, NICKS, CRACKS, GOUGES, CHIPPED FINISH AND/OR SIGNS OF VISIBLE DAMAGE.
5D5 Jun 20/83 71-00 Page 416A/416B BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
(7)
Raise aft end of engine until aft cone bolt protrudes through cone bolt fitting far enough to allow nut to be fully threaded.
(8)
Remove thread protector from aft cone bolt and apply light coat of Ease-Off 990 to threads and both sides of washer.
(9)
Install washer and fully thread nut on aft cone bolt. Install nut utilizing the aft cone bolt nut adapter fitting from the inboard side.
G. With all chain hoists relaxed, tighten cone bolt nuts as follows:
(1)
Tighten nuts to a torque range of 500 to 600 pound-inches in the following sequence: forward outboard, forward inboard, and aft.
(2)
Using the sequence specified in step (1), tighten nuts to a torque range of 800 to 900 pound-inches.
(3)
Using the sequence specified in step (1), tighten nuts to a torque range of 1000 to 1100 pound-inches.
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