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 ALL  ú ú C02 Page 682B ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
Inspection After an Engine Fire, Use of Fire Extinquishing Agents, or High
__________________________________________________________________________ Nacelle Temperature
___________________
 WARNING: DO NOT BREATHE THE GAS FROM THE FIRE
_______ EXTINGUISHER AGENT IN THE ENGINE AFTER IT IS USED. DO NOT LET THE AGENT TOUCH YOUR SKIN. YOU MUST HAVE A GOOD FLOW OF AIR AT THE LOCATION WHERE THE AGENT WAS USED. THE AGENTS ARE DANGEROUS AFTER IT IS USED. INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR IF YOU DO NOT OBEY THESE PRECAUTIONS.
 a)  If the agent was used in the nacelle, you must open the left and right fan cowl panels and the thrust reversers immediately to remove the halogen vapors (AMM 71-11-02/201 and AMM 78-31-00/201).
 b)  If the engine was operated at or above the maximum continuous power at the time the agent was used, rinse the engine externally with clean water from the combustion case to the aft end.
 S 216-058-C00
 (3)  Do these steps to examine the engine for damage and find the cause of the internal engine fire.
 (a)  
If you see flames in the engine inlet, remove the engine (AMM 71-00-02/401).

 (b)  
If the fire was contained in the exhaust area, use the EGT overtemperature limits (Fig. 610).

 NOTE: If the engine motors after the fire switches have
____ been closed, make an inspection of the engine-driven hydraulic pump (EPD) for possible damage.
 1) If the temperature is in area A: a) Use the troubleshooting procedure to find the cause of the internal engine fire (AMM 71-00-41/101). 2) If the temperature is in areas B, C, or D: a) Do the procedures to do a borescope inspection of the HPT blades and the 1st-stage LPT. b) Use the troubleshooting procedure to find the cause of the internal engine fire (AMM 71-00-41/101).
 S 216-060-C00
 (4)  Do one of the procedures given below after the fire extinquishing agents have been used on the internal area of the engine.
 (a)  If carbon dioxide (CO2) was used:
 1)  Remove the engine and make an inspection of the areas of the engine where the CO2 was used (AMM 71-00-02/401). a) Refer to the Engine Overhaul Manual for the inspection
 procedure.
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 72-00-00
 ALL  ú ú C01 Page 682C ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
Inspection After an Engine Fire, Use of Fire Extinquishing Agents, or High
__________________________________________________________________________ Nacelle Temperature
___________________
 (b)  If foam was used: 1) Wash the engine gaspath with clean water (AMM 72-00-00/701). 2) Dry motor the engine until all the unwanted material is removed and the engine is dry (AMM 71-00-00/201).
 3)  Remove the engine and make an inspection of the engine (AMM 71-00-02/401). a) Refer to the Engine Overhaul Manual for the inspection
 procedure.
 (c)  
If dry chemical powders were used: 1) Where it is possible, remove the loose powder with a vacuum cleaner and compressed air. 2) If the powder turned to a glaze due to high temperatures, clean the areas with the Ardrox 6025 cleaning agent. 3) Dry motor the engine to rinse and dry the engine (AMM 71-00-00/201). 4) Remove the engine and do an inspection (AMM 71-00-02/401).

 a)  Refer to the Engine Overhaul Manual for the inspection procedure.

 (d)  
If halogen products were used:

 CAUTION: DO NOT LET TITANIUM COMPONENTS TOUCH MATERIALS THAT
_______ CONTAIN HALOGEN. DAMAGE TO THE TITANIUM PARTS CAN OCCUR.
 1)  If you can operate the engine in 3 hours, do these steps: a) Dry motor the engine for 5 minutes (AMM 71-00-00/201). b) Stop the engine for 5 to 10 minutes. c) Dry motor the engine again for 5 minutes
 (AMM 71-00-00/201). d) Wash the engine gaspath (AMM 72-00-00/701). e) Change the engine oil (AMM 12-13-11/301). f) Before the next three hours, operate the engine at idle
 for 10 minutes (AMM 71-00-00/201).
 2)  If you cannot operate the engine before 3 hours, remove the engine (AMM 71-00-00/201). a) Refer to the Engine Shop Manual for the procedure to
　
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