Procedure After the Use of Fire Extinguishing Agents [IAE]

TASK 71-00-00-860-014-A
Procedure After the Use of Fire Extinguishing Agents

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TASK 29-00-00-280-006-A	Check of the Green or Yellow Hydraulic System after Engine Pump Failure or Operation in a Possible Cavitation Condition - with Ground Cart Available
TASK 29-00-00-280-006-A-01	Check of the Green or Yellow Hydraulic System after Engine Pump Failure or Operation in a Possible Cavitation Condition - Ground Cart not Available
TASK 70-11-56-910-001-A	Cleaning Requirements after Chemical Contact with Fire Extinguisher Agents, Hydraulic Fluid, Oil or Fuel

3. Job Set-up
Subtask 71-00-00-869-143-A ** ON A/C NOT FOR ALL

A. Not Applicable

4. Procedure
Subtask 71-00-00-280-050-A ** ON A/C NOT FOR ALL

A. If the crew closed the fire shut-off valve during operation of the fire extinguishers, do the "check of the hydraulic system after Operation of the engine pumps in possible starvation or cavitation condition": (Ref. AMM TASK 29-00-00-280-006).

Subtask 71-00-00-860-054-A ** ON A/C NOT FOR ALL

B. Procedure after the use of dry or foam chemical fire extinguishing agents

CAUTION: DO NOT START THE ENGINE WHEN DRY OR FOAM CHEMICAL FIRE EXTINGUISHING AGENTS POSSIBLY HAVE CONTAMINATED THE ENGINE GAS PATH. REMOVE THE ENGINE FROM SERVICE FOR SHOP VISIT TO DISASSEMBLE AND TO CLEAN ALL CONTAMINATED PARTS.

CAUTION: DO NOT PERFORM A COMPRESSOR WASH OF THE ENGINE GAS PATH AFTER EXPOSURE TO DRY OR FOAM CHEMICAL EXTINGUISHER AGENTS.

(1) After use of dry and foam chemical fire extinguishing it is necessary to clean all components which have contact with the chemical (Ref. AMM TASK 70-11-56-910-001). Do a visual and borescope inspection to find which parts of the engine are affected.

NOTE: It is not possible to remove all signs of dry or foam chemical agents without engine disassembly. It is permitted in assembled engine condition to clean the external flow and exit nozzle area only. Make sure no extinguishing agent is found to the engine gas path.

Subtask 71-00-00-110-062-A ** ON A/C NOT FOR ALL

C. Procedure after the Use of Other Fire Extinguishing Agents.
(1) Clean all components which have contact with the chemical (Ref. AMM TASK 70-11-56-910-001).

NOTE: The majority of fire extinguishing agents covered by this task requires engine disassembly and cleaning as well. Partial disassemble and cleaning is possible to a level where access to all parts is provided.

[Rev.10 from 2021] 2026.04.01 12:55:57 UTC