(4) Contamination by bronze particles:
CAUTION : THIS KIND OF CONTAMINATION CAN POTENTIALLY PARTIALLY OR
_______ TOTALLY CLOG THE ENGINE FUEL NOZZLES THUS LEADING TO AN ABNORMAL FUEL SPRAY AND CONSEQUENTLY CAUSE EXTENSIVE ENGINE HARDWARE DAMAGE. THE FOLLOWING TROUBLE SHOOTING SHALL BE STRICTLY APPLIED TO AVOID FURTHER ENGINE DAMAGE.
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E E Aug 01/05 E E ECES E F 『 E C F M E E E E 56-5B E E E NOTE : Evidence of bronze particles in the main fuel filter is
____ indicative of a main fuel pump HP bearin failure.
(a) Do a borescope inspection of the 1 LPT nozzle assembly (Ref. TASK 72-53-00-290-003).
(b) Do a borescope inspection of the 2 lpt nozzle segments assembly (Ref. TASK 72-54-00-290-007).
1 If the borescope inspection findings are unserviceable, remove
_
the engine.
2 If the results of the borescope inspection findings are in the
_ specified limits, 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.
a Replace all fuel nozzles (Ref. TASK 73-11-40-000-002)
_ (Ref. TASK 73-11-40-400-002).
b Replace the HMU (Ref. TASK 73-21-10-000-002) and (Ref. TASK
_
73-21-10-400-002).
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).
g Replace the IDG oil cooler (Ref. TASK 73-11-60-000-002) and
_ (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).
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5. Close-up
________ Subtask 73-11-10-410-064
A. Close Access
(1) Make sure that the work area is clean and clear of tool(s) and other items.
(2) Close the fan cowl doors: (Ref. TASK 71-13-00-410-040)
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
(3) Remove the warning notice(s).
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FUEL PUMP AND FILTER ASSEMBLY - REPAIRS
_______________________________________
TASK 73-11-10-300-002
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 brush
R No specific circuit breaker(s) safety clip(s) No specific clean soak No specific warning notice No specific container 4 l (1.0566 USgal)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the R External Power R 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied R from the External Power
71-13-00-010-040 Opening of the Fan Cowl Doors
71-13-00-410-040 Closing of the Fan Cowl Doors
73-11-10-400-004 Installation of the Fuel Filter Element
73-11-10-991-307 Fig. 801
73-11-10-991-308 Fig. 802
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3. Job Set-up
__________
Subtask 73-11-10-941-066
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a warning notice to tell persons not to start the engine. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320飞机维护手册 AMM 发动机燃油和控制 ENGINE FUEL AND CONTRO(42)
