747-400
MAINTENANCE MANUAL
SEE C SEE SEE A B OUTBOARD DOOR FLUSH
(5 LOCATIONS ON EACH HINGE, 4 HINGES ON EACH DOOR) BMS 3-33 SEE D
ACTUATOR DOOR
DOOR OUTBOARD
FWD INBOARD DOOR (5 LOCATIONS ON EACH HINGE, 4 HINGES ON EACH DOOR) INBOARD DOOR BMS 3-33 FLUSH 1 (1 LOCATION) SAFETY BAR BMS 3-33 BAR SAFETY
1 APPLY A SMOOTH LAYER OF BMS 3-33 TO THE FULL UPPER SURFACE OF THE BAR METHYL ETHYL KETONE OR BMS 11-7 SOLVENT. REMOVE THE COLLECTED RUBBER ON THE BAR WITH A 41 POINTS WHEEL WELL DOORS
Figure 309 (Sheet 1) Body Landing Gear Doors Lubrication
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A 747-400 MAINTENANCE MANUAL
OUTBOARD DOOR FLUSH
3 HINGES ON EACH DOOR) (5 LOCATIONS ON EACH HINGE, BMS 3-33
INBOARD DOOR FLUSH
4 HINGES ON EACH DOOR) (5 LOCATIONS ON EACH HINGE, BMS 3-33
DOOR OUTBOARD FWD SHOCK STRUT LINKAGE ROD
ROD LINKAGE INBOARD DOOR 15 POINTS B SHOCK STRUT DOOR
FWD
20 POINTS SHOCK STRUT DOOR STRUCTURE
C DOOR ACTUATOR BEAM ZERK
(3 LOCATIONS) BMS 3-33 ACTUATOR BEAM DOOR
3 POINTS
D
Body Landing Gear Doors Lubrication Figure 309 (Sheet 2)
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A 747-400 MAINTENANCE MANUAL
SEE A ACTUATOR RETRACT
STRUT SHOCK
FRAME
FRAME ZERK
(2 LOCATIONS) BMS 3-33
LINK ZERK
(2 LOCATIONS) UPLOCK HOOK LINK BMS 3-33 1 1 1 1 FRAME (2 LOCATIONS) BMS 3-33 ZERK
UPLOCK SPRING
1 2 A 12 POINTS 2 LENGTH OF EACH SPRING. OPPOSITE SIDE (NOT SHOWN). ONE MORE LUBE POINT IS ON THE (6 LOCATIONS) SPRAY THE ENDS AND THE Body Landing Gear Uplock Lubrication Figure 310 BMS 3-23
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A
747-400 MAINTENANCE MANUAL
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.
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.
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