SPRING BEAM BEARING BOLT HEAD
Spring Beam Installation
Figure 401 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. OUTBOARD STRUTS ú
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A
747-400
MAINTENANCE MANUAL
OUTBOARD FWD
SEE E COVER PLATE
SPONGE RUBBER SEAL (4 PLACES ON VAPOR BARRIER)
SEE F
SPONGE RUBBER
APPLY
SEAL SEALANT
(4 PLACES ON STRUT SKINON EDGE VAPOR BARRIER) VAPOR BARRIER OF COVER PLATE
DC
SCREW,
WASHER
_____STRUT NO. 1 SHOWN,
NOTE:
(9 PLACES) STRUT NO. 4 SIMILAR, BUT OPPOSITE
D
D
C
COVER PLATE
LEVELING
COMPOUND
LEVELING
COVER COMPOUND
PLATE FWD
COVER PLATE E
STRUT SKIN
COVER PLATE
APPLY SEALANT ON EDGE
OF COVER PLATE
C-C
APPLY SEALANT ON
____APPLY FILLET SEAL TO ALL AREAS EDGE OF COVER PLATE
NOTE:
MARKED )))) AND
D-D
Spring Beam Installation
Figure 401 (Sheet 3)
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A
747-400 MAINTENANCE MANUAL
SPRING BEAM SPRING BEAM SEAL DEPRESSOR SEAL DEPRESSOR
Spring Beam Installation
Figure 401 (Sheet 4)
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A
747-400 MAINTENANCE MANUAL
S 014-004
(3)
Remove the spring beam bearing access panel.
S 034-005
(4)
On the spring beams on the outboard side of the strut, remove nine screws and washers (below the leveling compound) that attach the spring beam cover plate to the vapor barrier.
S 014-039
(5)
Break the leveling compound and sealant.
S 014-040
(6)
Remove the cover plate.
S 014-041
(7)
Remove the leveling compound from the cover plate.
S 014-042
(8)
Remove the spherical bearing bolt, cotter pin, nut, spacers, and washers.
S 034-008
(9)
Remove the upper seal bracket by the removal of the screws that attach it.
S 024-009
WARNING: DO NOT NICK, SCRATCH, OR DAMAGE SURFACE OF SPRING BEAM.
_______ IF SPRING BEAM IS DAMAGED, SEE SRM 54-50-02 FOR DAMAGE LIMITS.
(10)
Lift the spring beam up to break the seal and withdraw the beam aft from the strut.
S 034-010
(11)
If the spring beam is damaged, remove the four sponge rubber seals which are bonded to the vapor barrier and the seal depressor which is bonded to the spring beam.
S 934-013
(12)
Tag the beam to show location in which the seals were removed from.
(a) This is to make sure that the installation is in the correct location.
TASK 54-51-03-404-014
3. Install the Spring Beam (Fig. 401)
_______________________
A. Consumable Materials
(1)
A00027 Adhesive - BAC 5010, Type 60
(2)
A00246 Sealant - BMS 5-95
(3)
A00310 Sealant - BMS 5-79 (optional to BMS 5-95)
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