(4)  
A00102 Sealant, silicone rubber (leveling compound) - RTV560

 (5)  
A00433 Sealant, silicone rubber (leveling compound) - RTV60 (optional to RTV560)

 (6)  
A00803 Sealant, fire resistant - BMS 5-63

 (7)  
B00148 Solvent - Methyl Ethyl Ketone (MEK), TT-M-261

 (8)  
C00317 Primer - Sealant BMS5-63, Class B-4 Compound.

 (9)  
C00580 Primer - DC1200

 (10)
 D00013 Grease - BMS 3-24References

 (1)  
AMM 54-51-01/401, Nacelle Strut

 (2)  
AIPC 54-51-03 Fig. 2

 (3)
OHM 54-00-01Access

 (1)  
Location Zone 452 Nacelle Strut 1 . Torque Box 454 Nacelle Strut 1 . Aft Fairing 482 Nacelle Strut 4 . Torque Box 484 Nacelle Strut 4 . Aft Fairing

 (2)  
Access Panel 452GL Left Spring Beam Bearing Panel - Nacelle Strut 1 452FR Right Spring Beam Bearing Panel - Nacelle Strut 1 482GL Left Spring Beam Bearing Panel - Nacelle Strut 4 482FR Right Spring Beam Bearing Panel - Nacelle Strut 4

Procedure
 S 214-015
 (1)  Examine the spring beam bearing and bushings.
 (a)  Repair or replace the bearing or bushings, if necessary (OHM 54-00-01).
 S 284-016
 CAUTION: DO NOT REMOVE OR CHANGE THE SPRING BEAM INTERFERENCE.
_______ THIS CAN CAUSE THE SPRING BEAM TO BE INSTALLED NOT CORRECTLY.
 (2)  
Make sure that the correct spring beam is to be installed in the proper position (as tagged when it was removed).

 S 434-017

 (3)  
If the spring beam was removed, bond four sponge rubber seals to the vapor barrier with adhesive.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. OUTBOARD STRUTS ú

 54-51-03
 ú ú 02 Page 407 ú Jun 10/96
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A
747-400 MAINTENANCE MANUAL
 S 344-043
 WARNING: DO NOT GET SOLVENTS IN YOUR MOUTH, OR YOUR EYES, OR ON_______
 YOUR SKIN. DO NOT BREATHE THE FUMES FROM SOLVENTS.
 SOLVENTS ARE HAZARDOUS MATERIALS. SOLVENTS MAY BE
 FLAMMABLE OR HARMFUL TO THE ENVIRONMENT. REFER TO PRODUCT
 MATERIAL SAFETY DATA SHEETS (MSDS) AND LOCAL REQUIREMENTS
 FOR PROPER HANDLING PROCEDURES.
 (4)  If the depressor was removed, bond seal to the spring beam with
 adhesive.
 (a) Before the bond clean both surfaces with MEK, Acetone, IPA, or
 Ethyl alcohol.
 (b) Apply primer to the surfaces.
 S 644-021
 (5)  Apply a thin layer of grease to the forward end (journal bearing) of
 the spring beam.
 S 424-022
 (6)  Install the beam in the strut.
 (a) Put the forward end of the beam into the bulkhead journal
 bearing.
 (b) Make sure that the seals are engaged properly with the spring
 beam.
 S 434-023
 (7)  Install the upper seal bracket.
 S 644-044
 (8)  Apply a thin layer of grease to the spherical bearing, bolt, bolt
 threads, washers and spacers.
 S 414-045
 (9)  Install the bolt, washer and spacer, with the bolthead outboard,
 adjacent to the strut skin.
 S 414-046

 (10) Install the washer, spacer and nut.
 (a)  Make sure that the washers are attached tightly under the head of the bolt and nut.
 S 434-027
 (11) Turn the bolt to ensure that the lugs on the door engage the slots in the bolt.
 (a)  Make sure that the lugs on the access door will engage slots on the bolthead when the door is closed.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. OUTBOARD STRUTS ú

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 ú ú 02 Page 408 ú Jun 15/98
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A
747-400 MAINTENANCE MANUAL
 S 434-028
 (12)
 Install the nut tightly up to 200 pound-inches (22.7 N.m), to line up the nut slot with the cotter pin hole.

 S 434-037
　
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