DOC AIRBUS | TSM A320FN2 Exceedance Indication on ECAM on Engine 2
TASK 77-00-00-810-915-A
N2 Exceedance Indication on ECAM on Engine 2
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 77-00-00-710-278-A ** ON A/C NOT FOR ALL
Subtask 77-00-00-810-199-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:37:35 UTC
N2 Exceedance Indication on ECAM on Engine 2
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 77-00-00-810-851-A | N2 Overlimit on Engine 1 or 2 |
| AMM 73-21-50-000-006 | Removal of J7 Harness |
| AMM 73-21-50-000-007 | Removal of J8 Harness |
| AMM 73-21-50-000-008 | Removal of the J9 Harness |
| AMM 73-21-50-000-009 | Removal of the J10 Harness |
| AMM 73-21-50-400-006 | Installation of the J7 Harness |
| AMM 73-21-50-400-007 | Installation of the J8 Harness |
| AMM 73-21-50-400-008 | Installation of the J9 Harness |
| AMM 73-21-50-400-009 | Installation of the J10 Harness |
| AMM 73-21-60-000-001 | Removal of the Electronic Control Unit (ECU) |
| AMM 73-21-60-400-001 | Installation of the Electronic Control Unit (ECU) |
| AMM 77-11-20-000-001 | Removal of the N2 Speed Sensor |
| AMM 77-11-20-000-002 | Removal of the N2 Speed Sensor . |
| AMM 77-11-20-400-001 | Installation of the N2 Speed Sensor |
| AMM 77-11-20-400-002 | Installation of the N2 Speed Sensor . |
Subtask 77-00-00-710-278-A ** ON A/C NOT FOR ALL
A. Test
(1) Not applicable.
4. Fault Isolation(1) Not applicable.
Subtask 77-00-00-810-199-A ** ON A/C NOT FOR ALL
A. This indication is set if the N2 speed has exceeded the limit (Red line). This indication may be spurious if it is not associated to the ECAM warning ENG 2 N2 OVERLIMIT.
(1) If this indication was associated to the ECAM warning ENG 2 N2 OVERLIMIT, do the trouble shooting procedure relative to this ECAM warning (Ref. TSM TASK 77-00-00-810-851).
(2) If this indication was not associated to the ECAM warning ENG 2 N2 OVERLIMIT, and not associated to any engine malfunction such as N1 auto acceleration, N1 OVERLIMIT, N1 fluctuations:
(a) no action is required, the indication is spurious.
(b) if any of the above listed malfunctions was noticed:
Subtask 77-00-00-810-199-B ** ON A/C NOT FOR ALL (1) If this indication was associated to the ECAM warning ENG 2 N2 OVERLIMIT, do the trouble shooting procedure relative to this ECAM warning (Ref. TSM TASK 77-00-00-810-851).
(2) If this indication was not associated to the ECAM warning ENG 2 N2 OVERLIMIT, and not associated to any engine malfunction such as N1 auto acceleration, N1 OVERLIMIT, N1 fluctuations:
(a) no action is required, the indication is spurious.
(b) if any of the above listed malfunctions was noticed:
- do the applicable trouble shooting procedure. Refer to the crew observation entry or ECAM warning entry ATA 77.
- inspect the
J7/J8 harness and associated connectors to the N2 speed sensor and ECU for signs of looseness, damage or contamination. Clean, repair or replace as required AMM 73-21-50-000-006 and AMM 73-21-50-400-006 and AMM 73-21-50-000-007 and AMM 73-21-50-400-007.
- replace the SENSOR-N2 ROTATIONAL SPD [4001EV] AMM 77-11-20-000-001 and AMM 77-11-20-400-001.
- replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.
A. This indication is set if the N2 speed has exceeded the limit (Red line). This indication may be spurious if it is not associated to the ECAM warning ENG 2 N2 OVERLIMIT.
(1) If this indication was associated to the ECAM warning ENG 2 N2 OVERLIMIT, do the trouble shooting procedure relative to this ECAM warning (Ref. TSM TASK 77-00-00-810-851).
(2) If this indication was not associated to the ECAM warning ENG 2 N2 OVERLIMIT, and not associated to any engine malfunction such as N1 auto acceleration, N1 OVERLIMIT, N1 fluctuations:
(a) no action is required, the indication is spurious.
(b) if any of the above listed malfunctions was noticed:
(1) If this indication was associated to the ECAM warning ENG 2 N2 OVERLIMIT, do the trouble shooting procedure relative to this ECAM warning (Ref. TSM TASK 77-00-00-810-851).
(2) If this indication was not associated to the ECAM warning ENG 2 N2 OVERLIMIT, and not associated to any engine malfunction such as N1 auto acceleration, N1 OVERLIMIT, N1 fluctuations:
(a) no action is required, the indication is spurious.
(b) if any of the above listed malfunctions was noticed:
- do the applicable trouble shooting procedure. Refer to the crew observation entry or ECAM warning entry ATA 77.
- inspect the
HJ7/HJ8 harness and associated connectors to the N2 speed sensor and ECU for signs of looseness, damage or contamination. Clean, repair or replace as required AMM 73-21-50-000-008 and AMM 73-21-50-400-008 and AMM 73-21-50-000-009 and AMM 73-21-50-400-009.
- replace the SENSOR-N2 ROTATIONAL SPD [4001EV] AMM 77-11-20-000-002 and AMM 77-11-20-400-002.
- replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.