Visual Inspection of the Fuel Filter Cartridge [CFMB]

TASK 73-11-10-210-003-A
Visual Inspection of the Fuel Filter Cartridge

ZONE: 400

1. Reason for the Job
You must do this visual inspection after each removal of the fuel filter element (cartridge) related to an ECAM warning "FUEL FILTER CLOG", or when you find an important contamination at the bottom of the fuel filter cover during any replacement of the fuel filter, whatever the reason. This inspection will help to find any possible contamination of the Aircraft and engine fuel supply systems.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-32-28-281-003-A	Sample Fuel for Microbiological Contamination Analysis
TASK 28-11-00-100-001-A	Cleaning of the Fuel Tanks
TASK 28-11-00-600-003-A	Removal of the Microbiological Particles
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 73-11-10-000-003-A	Removal of the Fuel Pump and Filter Assembly
TASK 73-11-10-000-004-A	Removal of the Fuel Filter Element
TASK 73-11-10-210-002-A	Visual Inspection of the Impeller Rotation
TASK 73-11-10-400-003-A	Installation of the Fuel Pump and Filter Assembly
TASK 73-11-10-400-004-A	Installation of the Fuel Filter Element
TASK 73-11-20-000-002-A	Removal of the Servo Fuel Heater
TASK 73-11-20-400-002-A	Installation of the Servo Fuel Heater
TASK 73-11-45-000-001-A	Removal of the Fuel Nozzle Filter (Downstream Fuel Filter)
TASK 73-11-45-400-001-A	Installation of the Fuel Nozzle Filter ((Downstream Fuel Filter)
TASK 73-11-50-000-002-A	Removal of the Fuel Return Valve (FRV)
TASK 73-11-50-400-002-A	Installation of the Fuel Return Valve
TASK 73-11-60-000-002-A	Removal of the Integrated Drive Generator (IDG) Oil Cooler Assembly
TASK 73-11-60-400-002-A	Installation of the Integrated Drive Generator (IDG) Oil Cooler Assembly
TASK 73-11-70-000-002-A	Removal of the Burner Selection Valve (BSV) for SAC Engines
TASK 73-11-70-000-002-A-01	Removal of the Burner Selection Valve (BSV) for DAC Engines
TASK 73-11-70-400-002-A	Installation of the Burner Selection Valve (BSV) for SAC Engines
TASK 73-11-70-400-002-A-01	Installation of the Burner Selection Valve (BSV) for DAC Engines
TASK 73-21-10-000-002-A	Removal of the Hydromechanical Unit (HMU)
TASK 73-21-10-400-002-A	Installation of the Hydromechanical Unit (HMU)
TASK 73-31-10-000-002-A	Removal of the Fuel Flow Transmitter
TASK 73-31-10-400-002-A	Installation of the Fuel Flow Transmitter
TASK 79-21-20-000-002-A	Removal of the Main Oil/Fuel Heat Exchanger
TASK 79-21-20-400-002-A	Installation of the Main Oil/Fuel Heat Exchanger
Examination of the Fuel Filter Cartridge for Contamination

3. Job Set-up
Subtask 73-11-10-941-060-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 73-11-10-010-070-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.

4. Procedure
Subtask 73-11-10-020-059-A ** ON A/C NOT FOR ALL

A. If not already removed, remove the fuel filter cartridge (10) from its housing on the fuel pump (Ref. AMM TASK 73-11-10-000-004).

Subtask 73-11-10-210-053-A ** ON A/C NOT FOR ALL

B. Do the inspection of the cartridge
(1) Examine the inner wall of the fuel filter housing (on the fuel pump) and the bottom of the fuel filter cover (20) to find out contaminants. For identification of the various types of contamination, see step C.
(2) Examine the removed fuel filter cartridge as follows:
(a) Take the filter cartridge (10) in both hands and put two pleats apart to show the contaminants at the bottom of these pleats. Do this at several locations around the cartridge.
(b) For identification of the various types of contamination, see step C.

Subtask 73-11-10-220-053-B ** ON A/C NOT FOR ALL

C. Identification of Various Types of Contamination

NOTE: Hours in service means clock time since service.

(1) Contamination by solids in small amounts (dirt, sand, metallic particles or sealant particles):

NOTE: This can be considered as normal contamination of the engine main fuel filter.

(a) Replace the fuel filter element (Ref. AMM TASK 73-11-10-000-004) and (Ref. AMM TASK 73-11-10-400-004).
(2) Contamination by solids in large amounts such as dirt, sand, metallic particles or sealant particles (no visible bronze particles):

NOTE: Possible causes are contaminated fuel, contaminated aircraft fuel tank(s), damaged aircraft boost pump, damaged engine LP stage fuel pump, foreign material, etc.

(a) Replace the fuel filter element (Ref. AMM TASK 73-11-10-000-004) and (Ref. AMM TASK 73-11-10-400-004).
(b) Do a check of the fuel filter element on the opposite engine.
(c) Do a visual inspection of the impeller rotation (Ref. AMM TASK 73-11-10-210-002).
(d) If you find contamination, do a check of the fuel tank for contamination and follow recommendations included in (Ref. AMM TASK 28-11-00-100-001).
(e) Install a new fuel filter element on both engines (Ref. AMM TASK 73-11-10-400-004):
1 If the ECAM warning "FUEL FILTER CLOG" did not come into view:
a After 24 hours in service, examine and replace the fuel filter cartridge (Ref. AMM TASK 73-11-10-000-004) and (Ref. AMM TASK 73-11-10-400-004).
2 If the ECAM warning "FUEL FILTER CLOG" came into view:
a Replace the fuel filter element (Ref. AMM TASK 73-11-10-000-004) and (Ref. AMM TASK 73-11-10-400-004).
b Do a check of the fuel filter on the opposite engine.
c Do a check of the aircraft fuel tanks and clean them (Ref. AMM TASK 28-11-00-600-003).
d Replace the downstream fuel filter (Ref. AMM TASK 73-11-45-000-001) and (Ref. AMM TASK 73-11-45-400-001).
e After 24 hours in service, examine and replace the fuel filter cartridge (Ref. AMM TASK 73-11-10-000-004) and (Ref. AMM TASK 73-11-10-400-004).
(3) Contamination by black sludge or slimy materials (biological contamination):

NOTE: This contamination can be due to fungus growth.

(a) Replace the fuel filter cartridge (Ref. AMM TASK 73-11-10-000-004) and (Ref. AMM TASK 73-11-10-400-004).
(b) Do a check of the fuel filter on the opposite engine.
(c) If it is found contaminated, check the fuel tank for contamination and follow recommendations included in (Ref. AMM TASK 12-32-28-281-003).
(d) If the ECAM warning "FUEL FILTER CLOG" came into view:
1 Replace the downstream fuel filter (Ref. AMM TASK 73-11-45-000-001) and (Ref. AMM TASK 73-11-45-400-001).
(e) After 24 hours in service, examine and replace the fuel filter cartridge (Ref. AMM TASK 73-11-10-000-004) and (Ref. AMM TASK 73-11-10-400-004).
(4) Contamination by bronze particles:

NOTE: Evidence of bronze particles in the main fuel filter is indicative of a main fuel pump HP bearing failure.

(a) Replace the engine fuel system components which follow:

NOTE: When components are disconnected, their tubes must be fully drained and blown with dry air to remove any bronze particles left.

1 Replace the HMU (Ref. AMM TASK 73-21-10-000-002) and (Ref. AMM TASK 73-21-10-400-002).
2 Replace the fuel pump and filter assembly (Ref. AMM TASK 73-11-10-000-003) and (Ref. AMM TASK 73-11-10-400-003) with a new fuel filter cartridge.
3 Replace the fuel flow transmitter (Ref. AMM TASK 73-31-10-000-002) and (Ref. AMM TASK 73-31-10-400-002).
4 Replace the servo-fuel heater (Ref. AMM TASK 73-11-20-000-002) and (Ref. AMM TASK 73-11-20-400-002).
5 Replace the main oil/fuel heat exchanger (Ref. AMM TASK 79-21-20-000-002) and (Ref. AMM TASK 79-21-20-400-002).
6 Replace the IDG oil cooler (Ref. AMM TASK 73-11-60-000-002) and (Ref. AMM TASK 73-11-60-400-002).
7 Replace the fuel return valve (Ref. AMM TASK 73-11-50-000-002) and (Ref. AMM TASK 73-11-50-400-002).
8 Replace the downstream fuel filter (Ref. AMM TASK 73-11-45-000-001) and (Ref. AMM TASK 73-11-45-400-001).

PRE SB CFM 73-0112 and 73-0114

9 Only applicable for SAC engines:
Replace the burner selection valve (Ref. AMM TASK 73-11-70-000-002) and (Ref. AMM TASK 73-11-70-400-002).
10 Only applicable for DAC engines:
Replace the burner selection valve (Ref. AMM TASK 73-11-70-000-002) and (Ref. AMM TASK 73-11-70-400-002).

END of PRE SB CFM 73-0112 and 73-0114

5. Close-up
Subtask 73-11-10-410-064-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 fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(3) FOR [1000EM1] (ENGINE-1)
437AL, 438AR.
(4) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(5) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:57:35 UTC