A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a warning notice to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a warning notice to tell persons not to energize the FADEC 1(2).
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_________ Subtask 72-00-00-110-062
A. Hand Cleaning of the Fan Gas Path CAUTION : DO NOT USE METHANOL OR ENGINE TITANIUM PARTS COULD BE DAMAGED.
_______
(1) Mix 20 percent of gas path cleaner (Material No. CP5060) with 80 percent of water.
(2) Spraying CAUTION : DO NOT SPRAY CLEANING SOLUTION DIRECTLY INTO BOOSTER (LPC)
_______ INLET. IF THE CLEANING SOLUTION IS PUT INTO THE BOOSTER INLET, THE ENGINE MUST BE OPERATED TO DRY OUT THE SOLUTION, OR ENGINE DAMAGE CAN OCCUR.
(a) Use anti-freeze mixture, if necessary (Ref. TASK 72-00-00-100-008).
(b) Spray the blades, the Outlet Guide Vanes (OGV), the acoustical panels and the fan inlet and outlet with the wash solution. Do not spray the fan wash solution into the Low Pressure Compressor (LPC) inlet.
NOTE : Apply the solution to the two sides of the blade at the 6
____ o'clock position. This will decrease the amount of solution that touches the blade dovetails. The solution will remove the lubricant. If you wipe the blades, do it in the down direction, away from the rotor.
(3) Rub the sprayed areas with a cloth.
(4) Rinse the blades with water. Subtask 72-00-00-110-063
B. Fan Blades Cleaning
(1) If the blades stay dirty, do the procedure which follows: CAUTION : DO NOT USE THIS SOLVENT NEAR FLAMES OR HEAT, BECAUSE THIS
_______ SOLVENT IS FLAMMABLE. DO NOT BREATHE THE GASES RELEASED FROM SOLVENT, DO NOT LET IT TOUCH YOUR SKIN OR CLOTHING AND MAKE SURE YOU HAVE A GOOD FLOW OF AIR, BECAUSE THIS SOLVENT IS DANGEROUS TO YOUR SKIN, EYES AND LUNGS.
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E E R (a) Remove light deposits with soft cloth and acetone (Material No. R CP1039) or stoddard solvent (Material No. CP2011) or ardrox 552 R (Material No. CP2559) or turco ind 79 (Material No. CP2560) or R mag-chem teksol (Material No. CP2566) or degreasol 99 R (Material R No. CP2584) or mag-chem skysol (Material No. CP2656) or isopropyl
alcohol (Material No. CP1041).
R (b) Remove heavy stubborn deposits with scotch brite type A CFS R (Material No. CP2240) or scotch brite type S CFS (Material No. R CP2279) and acetone (Material No. CP1039) or stoddard solvent R (Material No. CP2011) or ardrox 552 (Material No. CP2559) or R turco ind 79 (Material No. CP2560) or mag-chem teksol (Material R No. CP2566) or degreasol 99 R (Material No. CP2584) or mag-chem R skysol (Material No. CP2656) or isopropyl alcohol (Material No.
CP1041).
(c) Rinse thoroughly with water.
5. Close-up
________
Subtask 72-00-00-869-064
A. Make sure that the work area is clean and clear of tool(s) and other items.
Subtask 72-00-00-942-052
B. Remove the warning notice(s).
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Washing of the Engine Gas Path with Pure Water
1. Reason for the Job
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For EGT margin recovery, it is recommended to perform the engine gas path
water wash with pure water only.
Cleaning agent may be used at operator option (based on experience).
NOTE : If cleaning agent is used, proper aircraft maintenance configuration,
____ engine rinsing and post engine wash test must be completed to prevent the possibility of fumes in the cabin when aircraft resumes revenue flight operation. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320飞机维护手册 AMM ENGINE 发动机 1(72)
