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A319 captain reports trim wheel moving in a jerky fashion in response to autopilot trim inputs. Aircraft has a history of trim problems and crew elected to divert to a suitable airport for maintenance.
| Attributes | |
| ACN | 890903 |
| Time | |
| Date | 201005 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Component | |
| Aircraft Component | Horizontal Stabilizer Trim |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Maintenance |
Narrative:
Around two hours into the flight I noticed that the trim wheel was moving in a jerking motion rather than the smooth or fluid motion. Also the aircraft began to ossulate up and down between 250-300 FPM on the vsi. The autopilot was holding altitude within +/- 100 ft. Up until this point the trim system worked normally. After talking with maintenance control and our dispatcher; myself; the first officer and the dispatcher agreed the safest action was to divert. Maintenance control advised us that the aircraft had a history of trim problems; and on one test flight they received a jammed stab. However the aircraft was fixed and returned to service.
Original NASA ASRS Text
Title: A319 Captain reports trim wheel moving in a jerky fashion in response to autopilot trim inputs. Aircraft has a history of trim problems and crew elected to divert to a suitable airport for maintenance.
Narrative: Around two hours into the flight I noticed that the trim wheel was moving in a jerking motion rather than the smooth or fluid motion. Also the aircraft began to ossulate up and down between 250-300 FPM on the VSI. The autopilot was holding altitude within +/- 100 FT. Up until this point the trim system worked normally. After talking with Maintenance Control and our Dispatcher; myself; the First Officer and the Dispatcher agreed the safest action was to divert. Maintenance Control advised us that the aircraft had a history of trim problems; and on one test flight they received a Jammed Stab. However the aircraft was fixed and returned to service.
Data retrieved from NASA's ASRS site as of April 2012 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.