DOC AIRBUS | TSM A320FN1 High Vibration Detected
TASK 71-00-00-810-858-A
N1 High Vibration Detected
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 71-00-00-710-115-A ** ON A/C NOT FOR ALL
Subtask 71-00-00-860-069-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:35:04 UTC
N1 High Vibration Detected
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 71-00-00-810-834-A | General Troubleshooting Guidelines for Additional Troubleshooting Information |
| TSM TASK 71-00-00-810-835-A | Component and Harness Intermittent Troubleshooting Procedure for Guidance Troubleshooting Intermittent Faults |
| TSM TASK 71-00-00-810-856-A | Troubleshoot the Engine after a High (N1) Vibration event |
| AMM 71-00-00-700-802 | Test No. 8 - Vibration analysis (Vibration Survey) |
Subtask 71-00-00-710-115-A ** ON A/C NOT FOR ALL
A. Not Applicable
4. Fault IsolationNOTE: The vibration indication system (forward vibration sensor and aft vibration sensor) has detected that there is a high N1 vibration event.
- Refer to the general troubleshooting guidelines for additional troubleshooting information (Ref. TSM TASK 71-00-00-810-834).
- Refer to the component and harness intermittent troubleshooting procedure for guidance troubleshooting intermittent faults (Ref. TSM TASK 71-00-00-810-835).
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS WARNING, INJURY CAN OCCUR.
WARNING:
REFER TO THE MSDS FOR ALL MATERIAL USED AND THE MANUFACTURER'S SAFETY INSTRUCTIONS FOR ALL EQUIPMENT USED. IF YOU DO NOT OBEY THIS WARNING, INJURY CAN OCCUR.
CAUTION:
MAKE SURE YOU REMOVE ELECTRICAL POWER FROM THE EEC BEFORE YOU REMOVE THE ELECTRICAL CONNECTORS. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE EEC CAN OCCUR.
Subtask 71-00-00-810-122-A ** ON A/C NOT FOR ALL A. Do the step that follows:
(1) Troubleshoot the engine after a High N1 vibration event (Ref. TSM TASK 71-00-00-810-856) and refer to Table 1.
Table 1 - Vibration: Flight Deck Indicated vs Actual
Subtask 71-00-00-710-116-A ** ON A/C NOT FOR ALL (1) Troubleshoot the engine after a High N1 vibration event (Ref. TSM TASK 71-00-00-810-856) and refer to Table 1.
Table 1 - Vibration: Flight Deck Indicated vs Actual
| Flight Deck Indication | Actual |
|---|---|
| VIB N1 | Nf (Fan Vibration) |
| VIB N2 | N1 (LPC/LPT Vibration) or N2 (HPC/HPT Vibration) Determined by which input has the highest value. |
B. Repair Confirmation
(1) Do a vibration survey to confirm the repair of this fault AMM 71-00-00-700-802.
5. Close-up(1) Do a vibration survey to confirm the repair of this fault AMM 71-00-00-700-802.
Subtask 71-00-00-860-069-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(1) Make sure that the work area is clean and clear of tools and other items.