(13)
Install the cotter pin.
(a) It is permissible to omit the washer under the bolt head if necessary to enable the cotter pin to be inserted into the bolt hole.
S 344-029
(14)
Apply the sealant (BMS 5-79) approximately 0.10 inch (2.5 mm) thick to both ends of the cotter pin and nut slot.
S 644-031
(15)
Put the grease into the spring beam spherical bearing and bulkhead journal bearing fittings until the grease shows up around the bearing areas.
S 434-032
WARNING: THE SPRING BEAM COVER PLATE MUST BE SEALED AGAIN TO MAKE
_______ SURE THAT THE VAPOR SEAL REQUIREMENTS ARE MET.
(16)
Install the spring beam cover plate and reseal.
S 344-038
(17)
Seal the spring beam cover plate again.
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.
(a)
Clean the surfaces to be engaged with solvent , Series 84 (AMM 20-30-84).
(b)
Apply primer to the surfaces to be engaged.
(c)
Install nine screws and washers that attach the cover plate to the vapor barrier.
(d)
Apply the sealant (BMS 5-63) between the cover plate and strut (Fig. 401, Sheet 2).
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A
747-400 MAINTENANCE MANUAL
S 344-033
WARNING: THE LEVELING COMPOUND MUST BE APPLIED AFTER THE PLATE IS
_______
SEALED TO SUPPLY THE PROPER FLOW OF THE FLUIDS.
(18) Apply the leveling compound to the cover plate.
(a)
Make sure that the sealant (BMS 5-63) which was applied to the cover plate is dry and tack free.
(b)
Turn the assembly 2.7° nose up. 1) Use the Nac. WL as the horizontal reference plane.
(c)
Turn the assembly 4.5° from vertical (CW on strut position no. 1, or CCW on strut position no. 4; view looking forward).
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.
(d)
Clean cover plate surface that are not sealed with solvent , Series 84 (AMM 20-30-84).
(e)
Apply primer to the areas above.
(f)
Pour the leveling compound (sealant RTV60 or RTV560) into the lowest pocket that was formed by the structure (Fig. 401, Sheet 3). 1) Make sure that the drain inlets are not blocked. 2) Do not move the assembly until the leveling compound has
been cured.
S 414-034
(19)
Install the spring beam bearing access door.
(a) Make sure that the lugs on the door are engaged to the slots on the bolthead.
(20)
Install the nacelle strut (AMM 54-51-01/401).
S 434-036
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747-400 MAINTENANCE MANUAL
SPRING BEAM - INSPECTION/CHECK
______________________________
1. General_______
A. This procedure provides three tasks; a spring beam bolt rotation check, a spring beam bearing movement check, and a spring beam bearing radial freeplay check.
(1)
The spring beam bolt rotation check consists of removing engine, removing access panels, checking breakaway torque of bolt, injecting grease into fitting if torque not within limits, removing beam and bolt and replacing parts as necessary if torque still not within limits, installing access panels, and installing engine.
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