Procedure After Engine Fire or Use of Fire-Extinguishing Agents [CFMI]

TASK 72-00-00-200-002-A
Procedure After Engine Fire or Use of Fire-Extinguishing Agents

WARNING: A LARGE NUMBER OF O-RINGS, GASKETS AND OTHER TYPES OF SEALS ARE MADE OF VITON MATERIAL. VITON MATERIAL DECOMPOSES WHEN THE TEMPERATURE IS MORE THAN 750 DEG.F (400 DEG.C). ONE OF THE BY-PRODUCTS OF THIS DECOMPOSITION IS HYDROFLUORIC ACID. THIS ACID CAN CAUSE BAD BURNS. THUS, USE ACID-RESISTANT GLOVES IF YOU MUST REPLACE A VITON SEAL DURING MAINTENANCE AFTER A FIRE.

1. Reason for the Job
You must do this procedure when fire-extinguishing agents have been used.

NOTE: After any fire damage, the removal of the engine from the aircraft for inspection is necessary.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	VACUUM CLEANER
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2155)	ardox 6025

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

D. 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 71-00-00-000-040-A	Removal of the Power Plant
TASK 71-00-00-000-040-A-01	Removal of the Power Plant with the Engine Positioner TWW 75E
TASK 71-00-00-000-040-A-03	Removal of the Power Plant with Jacxson Tool
TASK 71-00-00-710-001-A	Dry Motoring Check
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 78-30-00-081-041-A	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-A	Closing of the Thrust Reverser Doors
ESM 720000

3. Job Set-up
Subtask 72-00-00-941-051-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) 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(S) to tell persons not to energize the FADEC 1(2).

Subtask 72-00-00-010-051-A ** ON A/C NOT FOR ALL

B. Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 72-00-00-040-051-A ** ON A/C NOT FOR ALL

C. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 72-00-00-010-056-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser doors (Ref. AMM TASK 78-36-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

4. Procedure
Subtask 72-00-00-280-073-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). Check of the Green or Yellow Hydraulic System after Operation in a Possible Cavitation Condition of the Engine Pump.

Subtask 72-00-00-280-051-A ** ON A/C NOT FOR ALL

B. Fire Extinguishing Agents Applied Externally

NOTE: Do as soon as possible to avoid soak of contamination on engine hardware.

(1) If the engine has been exposed to fire extinguishing agents on external surfaces, perform the following where appropriate:
(a) Carbon dioxide (CO2) contamination:
1 Cold sections: parts not exposed to heat require no maintenance action.
2 Hot sections: engine parts which were at elevated temperatures when exposed to CO2 must be removed and checked.
(b) Chemical foam contamination:

CAUTION: DO NOT ALLOW FOAM TO ENTER ANY ENGINE CAVITIES AS FOAM RESIDUES MAY CAUSE CORROSION DAMAGE.

1 Wash exposed areas using clean, running water.
2 Scrub to remove all foam agents.
(c) Dry chemical powders contamination:

CAUTION: DO NOT USE WATER. DRY AGENT COMBINES WITH WATER TO FORM AN EVEN MORE CORROSIVE COMPOUND. DO NOT ALLOW AGENT TO ENTER ANY ENGINE CAVITIES. RESIDUES WILL CAUSE CORROSION DAMAGE.

1 Remove all powder residues from engine by utilizing VACUUM CLEANER and compressed air at 35 +5 -5 psi (2.41 +0.34 -0.34 bar) as required.
2 If powder has turned to glaze due to elevated temperatures, scrub with ardox 6025 (Material No.CP2155) .

Subtask 72-00-00-280-052-A ** ON A/C NOT FOR ALL

C. Fire Extinguishing Agents Applied Internally
(1) If the engine has been exposed to fire extinguishing agents on internal surfaces, perform the following where appropriate:
(a) Carbon dioxide (CO2) contamination: Remove parts exposed to CO2 for inspection.
(b) Chemical foam contamination.

NOTE: Do as soon as possible to avoid soak of contamination on engine hardware.

1 Flush with clean water and motor engine (if practicable) to remove foam residues.
2 Remove engine for disassembly, inspection and cleaning (Ref. AMM TASK 71-00-00-000-040).
(c) Dry chemical powder contamination:
1 Remove all accessible loose powder using VACUUM CLEANER and compressed air at 35 +5 -5 psi (2.41 +0.34 -0.34 bar) .
2 If powder has turned to glaze due to elevated temperatures, rinse with ardox 6025 (Material No.CP2155) .
3 Dry-motor to clear and dry engine (Ref. AMM TASK 71-00-00-710-001).
4 Remove engine for disassembly and cleaning (Ref. AMM TASK 71-00-00-000-040) and ESM 720000.

5. Close-up
Subtask 72-00-00-410-051-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
(3) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(4) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 72-00-00-440-051-A ** ON A/C NOT FOR ALL

B. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041).

Subtask 72-00-00-410-056-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:37:34 UTC