Removal of Defective Inserts on the Main Fuel Filter Housing [CFMB]

TASK 73-11-10-300-002-A
Removal of Defective Inserts on the Main Fuel Filter Housing

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	BRUSH - BRISTLED
No specific	AR	CONTAINER 5 L (1.32 USGAL)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 73-11-10-400-004-A	Installation of the Fuel Filter Element
Housing Insert Location
Insert Extractor

3. Job Set-up
Subtask 73-11-10-941-066-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 73-11-10-861-053-A ** ON A/C NOT FOR ALL

B. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

Subtask 73-11-10-865-058-A ** ON A/C NOT FOR ALL

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FUEL/LP VALVE/MOT1/ENG2	2QG	A09
49VU	FUEL/LP VALVE/MOT1/ENG1	1QG	A08

Subtask 73-11-10-010-077-A ** ON A/C NOT FOR ALL

D. 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

4. Procedure

NOTE: The following procedure is applied in case of insert(s) found damaged. In case of insert damages, all helicoil inserts will be unscrewed.

Subtask 73-11-10-020-066-A ** ON A/C NOT FOR ALL

A. Remove the fuel filter cover.
(1) Put a CONTAINER 5 L (1.32 USGAL) under the engine for draining residual fuel.
(2) Cut and remove lockwire from drain plug (70).
(3) Remove drain plug (70) and let the fuel drain.
(4) Remove and discard O-ring (80) from the drain plug (70).
(5) Remove and discard the attaching bolts (60) and the washers (50) from the fuel filter cover (40).
(6) Remove the fuel filter cover (40).
(7) Remove and discard the O-ring (90) from the fuel filter cover (40).

Subtask 73-11-10-020-067-A ** ON A/C NOT FOR ALL

B. Remove the inserts from the main fuel pump housing.

Housing Insert Location ** ON A/C NOT FOR ALL

(1) Manufacture a tool for extracting insert.

Insert Extractor ** ON A/C NOT FOR ALL

(2) Engage the locally manufactured tool to the hole until it contacts the helicoil insert.
(3) Unscrew and remove all helicoil inserts from the main fuel pump housing.

Subtask 73-11-10-210-055-A ** ON A/C NOT FOR ALL

C. Visually inspect the aluminum thread housing.
(1) Remove the particles as necessary using a BRUSH - BRISTLED or a clean soak.

Subtask 73-11-10-420-065-A ** ON A/C NOT FOR ALL

D. Install the fuel filter cover.
(1) Refer to Installation of the Fuel Filter Element (Ref. AMM TASK 73-11-10-400-004) Configuration 2 or 3.

5. Close-up
Subtask 73-11-10-410-067-A ** ON A/C NOT FOR ALL

A. Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 73-11-10-865-059-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FUEL/LP VALVE/MOT1/ENG2	2QG	A09
49VU	FUEL/LP VALVE/MOT1/ENG1	1QG	A08

Subtask 73-11-10-862-053-A ** ON A/C NOT FOR ALL

C. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 13:05:16 UTC