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H49448
A
747-400
MAINTENANCE MANUAL
(6)
No specific testing has been done relative to the effects of these agents on oil systems, the oil system should be analyzed for contamination because agents could enter the oil system, especially for those engine models which use labyrinth seals.
B.
References
(1)
AMM 72-00-00/701, Engine - General
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747-400 MAINTENANCE MANUAL
REMOVAL OF EXTERNAL ENGINE CARBON (SPOP 2) - MAINTENANCE PRACTICES
__________________________________________________________________
1. General_______
A. This procedure gives the instructions to remove the carbon from external engine parts.
TASK 70-42-06-002-001-N00
2. Removal of External Engine Carbon_________________________________
A. Consumable Materials
(1)
Cleaner - Alkaline Gel (SPMC 135) (P11-053)
(2)
Cleaner - Alkaline Gel (SPMC 1136) (P11-053)
(3)
Cleaner - Alkaline Gel (SPMC 137) (P11-053)
B. Procedure
(1) S 952-002-N00Mask or plug the part, if necessary.
(2) S 112-003-N00Apply the cleaner at ambient temperature to the part.
NOTE:____ It is not necessary to make a solution of the alkaline gel cleaners. Use the alkaline gel cleaners at 100 percent by volume, as you receive them.
For carbon removal from tubes, pump the gel into the tubes.
(a) Let the part soak for 1 to 12 hours.
(3) S 172-004-N00Flush the cleaner fully with cold or hot water pressure spray.
(4) S 212-005-N00Do an inspection for removal of carbon. (a) If carbon is still present do steps 2 and 3 again. soak time is 24 hours. Maximum
(5) S 842-006-N00Remove the masking or plugs from the openings on the engine.
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747-400 MAINTENANCE MANUAL
POWER DENICKING AND BUFFING OF TITANIUM PARTS (SPOP 532) -
________________________________________________________ MAINTENANCE PRACTICES
_____________________
1. General_______
A. This procedure gives the steps for blending and buffing of titanium parts.
TASK 70-42-07-322-001-N00
2. Power Denicking and Buffing of Titanium Parts_____________________________________________
A. General
WARNING:_______ DO NOT REWORK TITANIUM WITH AN ABRASIVE TOOL THAT HAD
PREVIOUSLY BEEN USED TO REWORK ANOTHER TYPE OF METAL. TITANIUM
DUST CAN BE FIRE HAZARD. REMOVE BLEND DUST FREQUENTLY DURING
REPAIR.
CAUTION:_______LIMITS SPECIFIED IN THIS SECTION ARE FOR GENERAL USE ONLY. ALL PART-SPECIFIC LIMITS TAKE PRECEDENCE OVER THE LIMITS THAT FOLLOW. POST-BLEND SURFACE TREATMENT REQUIREMENTS WILL BE DETAILED WITHIN THE SPECIFIC BLEND REPAIR.
CAUTION:_______WHEN YOU DO THIS PROCEDURE. BE SURE TO USE GOOD SHOP PRACTICES AND COMMON SENSE. ABUSIVE BLENDING CAN CAUSE DAMAGE THAT IS HARMFUL THE LIFE AND FUNCTION OF THE REPAIRED PART.
CAUTION: TO CONTROL DUST AND NOISE CAUSED BY BLENDING, AND TO REDUCE THE
_______ RISK OF FIRE HAZARD FROM BLENDING DUST OF CERTAIN MATERIALS, WHENEVER POSSIBLE, DO THE BLENDING OPERATION IN A VENTILATED BOOTH. CONTACT YOUR LOCAL ENVIRONMENTAL HEALTH AND SAFETY PERSONNEL FOR SPECIFIC REQUIREMENTS.
CAUTION: USE ONLY MINIMUM PRESSURE WHEN YOU APPLY BLENDING TOOL TO
_______ PARTS. OVERHEATING OF PARTS DURING BLENDING CAN CAUSE EMBRITTLEMENT.
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