S 038-020-C00
(4)
Remove a sufficient number of fan blades to get access to the repair area (AMM 72-31-02/401).
S 168-021-C00
(5)
Prepare the shroud to receive the base and hardener (Fig. 802).
(a) Remove the damaged area from the shroud, with a scapel, until only the area without damage is there.
NOTE: Be careful not to damage the material on the fan inlet
____ case. Remove all the areas that are dirty with oil.
(b)
Make the surface of the repair area rough with an abrasive
cloth.
(c)
Blow the dust out of the shroud.
WARNING: DO NOT GET ACETONE IN YOUR MOUTH OR EYES, OR ON YOUR SKIN.
_______ DO NOT BREATHE THE FUMES FROM THE ACETONE. PUT ON A PROTECTIVE SPLASH GOGGLE AND GLOVES WHEN YOU USE ACETONE. KEEP ACETONE AWAY FROM SPARKS, FLAME AND HEAT. ACETONE IS A POISONOUS AND FLAMMABLE SOLVENT WHICH CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
(d) Clean the area to be repaired with acetone.
S 848-022-C00
(6) Prepare the base and hardener for the repair.
WARNING: PUT ON PROTECTIVE GLOOVES WHEN YOU USE THE BASE AND
_______ HARDENER. IF YOU DO NOT OBEY THIS PRECAUTION, INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(a) Mix, by weight, 100 parts of the base and 94 parts of the
hardener.
NOTE: Polymerization occurs at 86°F (30°C) after 30 minutes.
____
Prepare the mixture in small quantities.
(b) Mix the base and hardener with your hand until it becomes a pale blue homogeneous compound. 1) Mix the base and hardener slowly to prevent air bubbles in
the mixture.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
ABRADABLE SHROUD
A-A
S-M56-SM-6346-(1)-00-C
Repair of the Abradable Shroud Figure 802
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
S 368-023-C00
(7) Apply the compound on the repair area as follows:
(a) Heat the abradable shroud material and fan case in the repair
area to 86°F (30°C) to apply the compound.
NOTE:____ The compound has a pot life of approximately 30 minutes
at 86°F (30°C).
(b) Apply the compound with a spatula.
(c) Lightly hit the compound to remove the air bubbles.
(d) Cure the compound at 86°C (30°C) for 24 hours or at 140°F
(60°C) for 1 hour.
(e) Make sure the repair is constant in color.
1) Make sure the repair does not contain air bubbles.
(f) Use a scalpel and an abrasive cloth to make the repaired
surface smooth with all adjacent areas of the abradable shroud
(Fig. 802).
S 168-024-C00
(8) Clean the inlet area.
S 438-025-C00
(9) Install the fan blades (AMM 72-31-02/401).
S 038-026-C00
(10) Remove the mats from the lower half of the inlet cowl.
(a) Make sure there is no tools or material in the inlet.
S 868-027-C00
(11)
Remove the DO-NOT-OPERATE identifier from the start levers.
S 868-028-C00
(12)
Remove the DO-NOT-CLOSE identifier and close the applicable circuit breaker:
(a) P6 Load Control Center 1) ENG 1 START VALVE 2) ENG 2 START VALVE
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