- replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
(b) If the resistance values are out of the specified limits:
- disconnect the harness CJ13 at the 6 o'clock junction box and do a resistance check of the harness CJ13 between: . pins 3 and 13 (1 to 10 ohms) . pins 3 and 12 (> 10 megohms) . pin 3 and the ground (> 10 megohms).
1 If the resistance values are in the specified limits:
_
- replace the harness J13 (Ref. AMM TASK 73-21-50-000-046) and (Ref. AMM TASK 73-21-50-400-046).
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2_ If the resistance values are out of the specified limits:
- disconnect the harness CJ13 from the T495 thermocouple and
do a resistance check of the T495 thermocouple between:
. pins A and B (1 to 10 ohms)
. pin A and the ground (> 10 megohms).
_
- replace the harness CJ13 (Ref. AMM TASK 73-21-50-000-029) and (Ref. AMM TASK 73-21-50-400-029).
b If the resistance values are out of the specified limits,
_ do an inspection/check of the T495 thermocouple wiring harness for isolation of the defective part (Ref. AMM TASK 77-21-10-200-002).
- if the electrical check of one of the three two-probe lead assemblies is not correct, replace the defective thermocouple: . the lower left-hand thermocouple lead assembly (Ref. AMM TASK 77-21-10-000-027) and (Ref. AMM TASK 77-21-10-400-027) or . the lower right-hand thermocouple lead assembly (Ref. AMM TASK 77-21-10-000-029) and (Ref. AMM TASK 77-21-10-400-029) or . the upper left-hand thermocouple lead assembly (Ref. AMM TASK 77-21-10-000-028) and (Ref. AMM TASK 77-21-10-400-028).
- if the electrical check of the three-probe lead assembly is not correct: . replace the three-probe thermocouple lead assembly (Ref. AMM TASK 77-21-10-000-026) and (Ref. AMM TASK 77-21-10-400-026), (Ref. AMM TASK 77-21-10-000-027) and (Ref. AMM TASK 77-21-10-400-027), (Ref. AMM TASK 77-21-10-000-028) and (Ref. AMM TASK 77-21-10-400-028), (Ref. AMM TASK 77-21-10-000-029) and (Ref. AMM TASK 77-21-10-400-029).
- if the electrical check of the upper extension lead is not correct: . replace the upper extension lead (Ref. AMM TASK 77-21-10-000-008) and (Ref. AMM TASK 77-21-10-400-008).
- if the electrical check of the lower extension lead is not correct: . replace the lower extension lead (Ref. AMM TASK 77-21-10-000-009) and (Ref. AMM TASK 77-21-10-400-009).
- if the electrical check of the main junction box assembly is not correct: . replace the main junction box assembly (Ref. AMM TASK 77-21-10-000-025) and (Ref. AMM TASK 77-21-10-400-025).
B. Do a minimum idle check (Ref. AMM TASK 71-00-00-710-006).
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TASK 77-00-00-810-854
Loss of the EGT Indication on Engine 1 or 2
1. Possible Causes
_______________
- DMC1 (1WT1)
- harness J13
- ECU (4000KS)
- harness CJ13
- lower left-hand thermocouple lead assembly
- lower right-hand thermocouple lead assembly
- upper left-hand thermocouple lead assembly
- three-probe thermocouple lead assembly
- upper extension lead
- lower extension lead
- main junction box assembly
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 31-63-34-000-001
AMM 31-63-34-400-001
AMM 71-00-00-710-003
AMM 73-21-50-000-029
AMM 73-21-50-000-046
AMM 73-21-50-400-029
AMM 73-21-50-400-046
AMM 73-21-60-000-001
AMM 73-21-60-400-001
AMM 77-21-10-000-008
AMM 77-21-10-000-009
AMM 77-21-10-000-025
AMM 77-21-10-000-026
AMM 77-21-10-000-027
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本文链接地址：A320 Trouble Shooting Manual 排故手册 发动机指示(79)
