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Air carrier captain experiences excessive N1 vibration at FL350. After a discussion with maintenance control the captain elects to continue to destination. The vibration diminishes as the aircraft descends for approach.
| Attributes | |
| ACN | 1027035 |
| Time | |
| Date | 201207 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | IMC |
| Aircraft 1 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Component | |
| Aircraft Component | Turbine Engine |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 123 Flight Crew Total 21500 Flight Crew Type 6950 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
En route at FL350 number one engine N1 vibration increased to as much as 8.1 units. Reduced thrust turned on engine anti-ice (temperature -44) and complied with the checklists. Called dispatch; patch to maintenance control. Says no relation to leak deferred before flight. After a discussion with all parties [we] agreed to continue to destination. As we descended to landing vibration was reduced; landed uneventfully.
Original NASA ASRS Text
Title: Air Carrier Captain experiences excessive N1 vibration at FL350. After a discussion with Maintenance Control the Captain elects to continue to destination. The vibration diminishes as the aircraft descends for approach.
Narrative: En route at FL350 number one engine N1 vibration increased to as much as 8.1 units. Reduced thrust turned on engine anti-ice (temperature -44) and complied with the checklists. Called Dispatch; patch to Maintenance Control. Says no relation to leak deferred before flight. After a discussion with all parties [we] agreed to continue to destination. As we descended to landing vibration was reduced; landed uneventfully.
Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.