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 - do a check of the harnesses J5 and J6 and the thrust reverser harnesses and the junction box between the ECU and the HCU for correct condition,

 - do a check of the connectors for looseness, bent pins, corrosion or contamination.

 (a) If damage is found:

 - clean, repair or replace as required (Ref. AMM TASK 71-51-44-000-002) and (Ref. AMM TASK 71-51-44-400-002).

 (b) If no damage is found and fault continues while maintenance message is never confirmed during the test:

 - replace the PRESS SW-HCU (4102KS) (Ref. AMM TASK 78-31-16-000-040) and (Ref. AMM TASK 78-31-16-400-040).

 (c) If the fault continues:

 - repair or replace the defective harnesses J5 or J6 or thrust reverser harness (Ref. AMM TASK 71-51-44-000-002) and (Ref. AMM TASK 71-51-44-400-002).

 (d) If the fault continues:

 - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
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E F 『 E C F M E E E E 56 E E E B. Do the test given in Para. 3.A.

 (1) No additional maintenance action is required if the fault is not confirmed.

 (2) Repeat the fault isolation procedure if the fault continues.

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E

 

 

　
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