a) Apply sealant to fill the cracks or replace sealant removed for check (no more steps are necessary).
3) If there are cracks that go to the lug surface, do these steps: a) Look for corrosion on the lug surface adjacent to the
bushing flange.
NOTE: You can clean the lug surface (in the area
____ of the cracks) with a cloth that is moist with solvent.
b) Remove sealant until you can see all of the corrosion.
c) If you see corrosion on the lug surface adjacent to the bushing flange, you must replace the bushing and repair the lug surface at or before a subsequent maintenance interval.
d) Apply a red witness line or an equivalent identification mark.
NOTE: This will help you find bushings that will need
____ the compound applied at a subsequent maintenance interval
e) Remove 0.10-0.20 inch of sealant at two or more locations (for example, the bottom or outboard side of the bushing) to let the moisture out of the joint when you apply the compound.
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747-400 MAINTENANCE MANUAL
f) Apply a spray of compound between the bushing flange and the lug surface.
g) Lubricate the joint again to remove all compound from the joint.
(b) JOINTS THAT HAVE WITNESS LINES (OR AN EQUIVALENT IDENTIFICATION MARK); Do the steps that follow: 1) If you see corrosion on the lug surface adjacent to the
bushing flange, you must replace the bushing and repair the lug surface at or before a subsequent maintenance interval. 2) Apply a spray of compound between the bushing flange and the lug surface. 3) Lubricate the joint again to remove all compound from the joint.
S 033-068
WARNING:_______OBEY THE REMOVAL PROCEDURE FOR THE DOOR LOCKS. THE DOORS CAN OPEN AND CLOSE QUICKLY. THE MOVEMENT OF THE DOORS CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
(5) Remove the door locks (AMM 32-00-30/201).
TASK 12-21-01-603-052
5. Body Gear Truck Beam Pivot Bolt Lubrication (Fig. 316)___________________________________________
A. General
(1) This is a Scheduled Maintenance task.
B. Standard Tools and Equipment
(1) ZERK gun (grease gun)
C. Consumable Materials
(1)
D00528 Grease - Royco11MS (recommended for Body Gear Truck Beam Pivot Bolt).
(2)
D00633 Grease - BMS 3-33 (preferred)
(3)
D00013 Grease - MIL-G-23827 (optional)
D. References
(1)
AMM 09-11-00/201, Towing
(2)
AMM 32-00-30/201, Landing Gear Door Locks
E. Access
(1) Location Zone
755 Body Landing Gear, LH
765 Body Landing Gear, RH
F. Procedure
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S 863-020
WARNING: MAKE SURE THE GROUND LOCKS ARE INSTALLED IN ALL OF THE LANDING
_______ GEAR. WITHOUT THE GROUND LOCKS, THE LANDING GEAR CAN RETRACT AND CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
(1) Make sure the ground locks are installed in the nose and main landing gear (AMM 09-11-00/201).
S 493-021
WARNING:_______OBEY THE INSTALLATION PROCEDURE FOR THE DOOR LOCKS. THE DOORS CAN OPEN AND CLOSE QUICKLY. THE MOVEMENT OF THE DOORS CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
(2)
Open the doors for the wing and body landing gears and install the door locks (AMM 32-00-30/201).
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