(a) No maintenance action is required.
(2) If the failure messages N1 SNSR, J9, ECU and N1 SNSR, J10, ECU are not confirmed but are repetitive:
- disconnect HJ9 harness from the N1 sensor (N1-A connector) and disconnect HJ10 harness from the N1 sensor (N1-B connector).
(a) Visually examine the receptacles and the connectors for damaged pins or contamination (Ref. AMM TASK 73-21-50-210-002).
(b) If the failure continues during the subsequent flights:
- replace the SENSOR-N1 ROTATIONAL SPD (4000EV) (Ref. AMM TASK 77-11-10-000-002) and (Ref. AMM TASK 77-11-10-400-002).
(c) If the failure continues during the subsequent flights:
- replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
(d) If the failure continues during the subsequent flights:
- replace the HJ9 harness (Ref. AMM TASK 73-21-50-000-042) and (Ref. AMM TASK 73-21-50-400-042).
(e) If the failure continues during the subsequent flights:
1_ If damage is found:
- repair or replace as required.
2_ If no damage is found:
- do a cleaning of the connectors and receptacles using a
bristle brush with stoddard solvent (Material No. CP2011)
(Ref. AMM TASK 73-21-50-210-002).
- replace the HJ10 harness (Ref. AMM TASK 73-21-50-000-043) and (Ref. AMM TASK 73-21-50-400-043).
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(3) If the failure message N1 SNSR, J9, ECU is confirmed:
- disconnect the HJ9 harness from the N1 sensor (N1-A connector).
(a) Visually examine the receptacles and the connectors for damaged pins or contamination (Ref. AMM TASK 73-21-50-210-002).
1 If damage is found:
_ - repair or replace as required.
2 If no damage is found:
_
- do the electrical resistance test through the N1 sensor (4000EV) (channel A) between: . pins 1 and 2 (40 to 80 ohms)
for S/N different than 25451 and up
. pins 1 and 3 (>5 kiloohms)
. pin 1 and the ground (>10 megohms)
for S/N 25451 and up
. pins 1 and 3 (>10 megohms)
. pin 1 and the ground (>10 megohms).
a If the resistance values are out of the specified limits:
_
- replace the N1 sensor (4000EV) (Ref. AMM TASK 77-11-10-000-002) and (Ref. AMM TASK 77-11-10-400-002).
b If the resistance values are in the specified limits.
_
- connect the HJ9 harness to the N1 sensor.
(b) Disconnect connector HJ9 from the ECU (4000KS) receptacle and visually examine the receptacles and the connectors for damaged pins or contamination (Ref. AMM TASK 73-21-50-210-002).
1 If damage is found:
_ - repair or replace as required.
2 If no damage is found:
_
- do the electrical resistance test through the HJ9 harness between: . pins 16 and 17 (40 to 80 ohms)
for S/N different than 25451 and up
. pins 16 and 6 (>5 kiloohms)
. pin 16 and the ground (>10 megohms)
for S/N 25451 and up
. pins 16 and 6 (>10 megohms)
. pin 16 and the ground (>10 megohms).
a If the resistance values are in the specified limits:
_
- 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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b If the resistance values are out of the specified limits:
_
- replace the HJ9 harness (Ref. AMM TASK 73-21-50-000-042) and (Ref. AMM TASK 73-21-50-400-042).
(4) If the failure message N1 SNSR, J10, ECU is confirmed:
- disconnect the HJ10 harness from the N1 sensor (N1-B connector).
(a) Visually examine the receptacles and the connectors for damaged pins or contamination (Ref. AMM TASK 73-21-50-210-002).
1 If damage is found:
_ - repair or replace as required.
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本文链接地址：A320 Trouble Shooting Manual 排故手册 发动机指示(118)
