c Replace the fuel pump and filter assembly (Ref. TASK 73-11-
_ 10-000-003) and (Ref. TASK 73-11-10-400-003) with a new fuel filter cartridge.
d Replace the fuel flow transmitter (Ref. TASK 73-31-10-000-
_ 002) and (Ref. TASK 73-31-10-400-002).
e Replace the servo-fuel heater (Ref. TASK 73-11-20-000-002)
_ and (Ref. TASK 73-11-20-400-002).
f Replace the main oil/fuel heat exchanger (Ref. TASK 79-21-
_ 20-000-002) and (Ref. TASK 79-21-20-400-002).
F 『R EEFF : 001-049, 051-061, 101-102, 201-202, E Page 62073-11-10
E E May 01/05 E E ECES E g Replace the IDG oil cooler (Ref. TASK 73-11-60-000-002) and
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_ (Ref. TASK 73-11-60-400-002).
h Replace the fuel return valve (Ref. TASK 73-11-50-000-002)
_ and (Ref. TASK 73-11-50-400-002).
i Replace the burner staging valve (Ref. TASK 73-11-70-000-
_ 002) and (Ref. TASK 73-11-70-400-002).
R **ON A/C 062-099, 103-105, 151-199, 203-211,
Subtask 73-11-10-220-050-A
C. Identification of Various Types of Contamination
(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. TASK 73-11-10-000-004) and (Ref. TASK 73-11-10-400-004).
(2) Contamination by solid in large amounts such as dirt, sand, metallic debris 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. TASK 73-11-10-000-004) and (Ref. TASK 73-11-10-400-004).
(b) Do a check of the fuel filter element on the opposite engine.
(c) Do a check of the aircraft fuel tanks and clean them (Ref. TASK 28-11-00-600-003) .
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(d) Install a new fuel filter element on both engines (Ref. 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. TASK 73-11-10-000-004) and (Ref. TASK 73-11-10-400-004).
2 If the ECAM warning "FUEL FILTER CLOG" came into view:
_ a Replace the fuel filter element (Ref. TASK 73-11-10-000-
_ 004) and (Ref. 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. TASK 28-11-00-600-003).
d Replace the downstream fuel filter (Ref. TASK 73-11-45-000-
_ 040) and (Ref. TASK 73-11-45-400-040).
e After 24 hours in service, examine and replace the fuel
_ filter cartridge (Ref. TASK 73-11-10-000-004) and (Ref. TASK 73-11-10-400-004).
(3) Contamination by black sludge or slimy materials: NOTE : This contamination can be due to fungus growth:
____
(a) Replace the fuel filter cartridge (Ref. TASK 73-11-10-000-004) and (Ref. TASK 73-11-10-400-004).
(b) Do a check of the fuel filter on the opposite engine.
(c) Clean the aircraft fuel tanks, flush the fuel lines and do a biocidal shock treatment (Ref. TASK 28-11-00-600-003) and (Ref. TASK 28-11-00-600-004).
(d) If the ECAM warning "FUEL FILTER CLOG" came into view: 1 Replace the downstream fuel filter (Ref. TASK 73-11-45-000-
_
040) and (Ref. TASK 73-11-45-400-040).
(e) After 24 hours in service, examine and replace the fuel filter cartridge (Ref. TASK 73-11-10-000-004) and (Ref. TASK 73-11-10-400-004).
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(4) Contamination by bronze particles: NOTE : Evidence of bronze particles in the main fuel filter is
____ indicative of a main fuel pump HP bearin failure.
(a) Replace the engine fuel system components which follow: NOTE : When components are disconnected, their tubes must be
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