B.
References
(1)
AMM 71-11-04/201, Fan Cowl Panels
(2)
AMM 71-11-06/201, Core Cowl Panels
(3)
AMM 78-31-00/201, Thrust Reverser System
C.
Access
(1)
Location Zone
412 Engine 1 - Engine
422 Engine 2 - Engine
432 Engine 3 - Engine
442 Engine 4 - Engine
(2)
Access Panel 415 and 416 Thrust Reverser Halves - Engine 1 425 and 426 Thrust Reverser Halves - Engine 2 435 and 436 Thrust Reverser Halves - Engine 3 445 and 446 Thrust Reverser Halves - Engine 4
D.
Put the Airplane Back to its Usual Condition
S 416-306-N00
WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU CLOSE THE
_______ THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(1)
Close the thrust reversers (AMM 78-31-00/201).
(2)
Close the core cowl panels (AMM 71-11-06/201).
S 446-309-N00
(3)
Do the activation procedure for the thrust reverser (AMM 78-31-00/201).
(4)
Close the fan cowl panels (AMM 71-11-04/201).
S 416-307-N00
S 416-308-N00
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
72-00-00
ALL ú ú N01 Page 686N ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
ENGINE - CLEANING/PAINTING
__________________________
1. General
_______
CAUTION: DO NOT DO THIS PROCEDURE ON MORE THAN ONE ENGINE DURING THE SAME
_______
MAINTENANCE VISIT.
A. Do not do this procedure on more than one engine during the same
maintenance visit.
CAUTION: IT IS NOT RECOMMENDED THAT YOU CLEAN AN ENGINE WITH WATER, IF A
_______ FIRE EXTINGUISHING AGENT MADE OF A DRY CHEMICAL POWDER WAS USED IN THE GASPATH. WATER WILL CAUSE THE DRY CHEMICAL POWDER TO BECOME TACKY AND BOND TO THE ENGINE PARTS.
THE DRY CHEMICAL POWDER MUST BE MADE NEUTRAL AND REMOVED FROM ALL ENGINE PARTS AT THE FIRST AVAILABLE TIME. THE DRY CHEMICAL POWDER CAN CAUSE CORROSION DAMAGE TO THE COMPRESSORS, HOT SECTION, AND TURBINE AREA PARTS. IT CAN ALSO CAUSE ENGINE OIL CONTAMINATION.
B. This procedure includes four tasks. The first task gives the instructions to clean the engine gaspath using water with or without detergent (wet) for regular maintenance. The second task gives the instructions to clean the engine after the fire extinguishing agents are used (dry) and the engine will continue to operate. The third task gives the instructions to clean the engine after the fire extinguishing agents are used (dry) and the engine will be removed. The last task gives the instructions to clean the EPR (Engine Pressure Ratio) PT4.95 probes (pressure sensing holes).
C. A large quantity of airflow in the engine can cause contamination to collect on the compressor blades. This contamination can decrease the engine performance. Clean the contamination off the compressor blades to increase the engine performance.
D. A regular maintenance (wet) cleaning procedure of the engine internal gaspath does an engine motor operation with the starter. This is done while you apply water or a water and Gaspath cleaner mixture into the low pressure compressor inlet. Alcohol is added to the water when the temperature is below 0° C. The internal engine areas are made dry when the engine is operated.
E. After the fire extinguishing agents are used, the (dry) cleaning procedure for the engine internal gaspath does an engine motor operation with the starter. This procedure blows out as much of the fire extinguishing agent as possible.
TASK 72-00-00-107-001-N00
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