S 018-109-C00
G. Repair the Abradable Shroud with Circular Patches
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
S 348-118-C00
CAUTION:_______THIS REPAIR MUST NOT BE DONE IN A HUMID ATMOSPHERE. THIS COULD AFFECT THE QUALITY OF THE BONDING COMPOUND. THE MINIMUM TEMPERATURE MUST BE 60°F (15°C).
(1) Remove the pieces of abradable liner (Fig. 805).
(a)
Punch out the abradable material to the base metal, at the location of the defect, maximum diameter 1.968 in. (50 mm).
(b)
Use a scalpel and abrasive cloth CP2239 size 80 or 120 to remove all pieces of the abradable material.
(c)
Blow the part clean with shop air.
S 118-093-C00
WARNING: DO NOT USE THIS SOLVENT NEAR FLAMES OR HEAT, BECAUSE THIS
_______ SOLVENT IS FLAMMABLE. DO NOT LET IT TOUCH YOUR SKIN OR CLOTHING AND MAKE SURE YOU HAVE A GOOD FLOW OF AIR, BEACUASE THIS SOLVENT IS DANGEROUS TO YOUR SKIN, EYES AND LUNGS.
(2)
Use the solvent CP1040 to remove the grease from the area to be repaired.
S 348-094-C00
(3)
Apply the abradable liner patch.
(a)
Remove grease from the part with a clean, white cloth soaked in solvent CP1040.
(b)
Alternative Procedure Available - Prepare the bonding compound
_______________________________ of base RTV 147A (CP2297) and hardener RTV 147B (CP2298) as follows:
NOTE: You must use the compound in less than 2 hours after
____
it is mixed.
1) Mix 100 parts of RTV 14 (CP2297) with 10 parts of catalyst 147B (CP2298), at ambient temperature.
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SEE A
SEE B
FAN CASE
ABRADABLE SHROUD IN
SILICONE FILLED WITH
HOLLOW GLASS BEADS
FWD A
S-M56-MM-03118-00-BNOTE:ALL ENGINE COMPONENTS EXCEPT THE FAN CASE REMOVED FOR CLARITY.
Repair of the Abradable Shroud with Circular Patches
Figure 805 (Sheet 1)
E63114
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
MAXIMUM REPAIR AREA
(50 mm) MAXIMUM
Repair of the Abradable Shroud with Circular Patches
Figure 805 (Sheet 2)
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
2) Stir the mixture manually or mechanically until it is fully mixed.
(c) Alternative Procedure - Prepare the bonding compound of RTV 630_____________________ Part A and Part B as follows:
NOTE: You must use the compound in less than 2 hours after
____
is mixed.
1) Mix by weight 100 parts of RTV 630 Part A (CP2339) with 10 parts of RTV 630 Part B (CP2339) at ambient temperature.
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