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A crj-700 rudder trim deflected full left with the autopilot engaged; so the QRH was completed; the rudder re-centered and the flight continued but the captain refused the aircraft for further service after maintenance found no faults.
| Attributes | |
| ACN | 1075768 |
| Time | |
| Date | 201303 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Regional Jet 700 ER/LR (CRJ700) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Rudder Control System |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Maintenance |
Narrative:
At FL350; straight and level cruise with autopilot engaged. Aircraft began a roll to the right. Crew noticed rudder brick off center. Scanned instruments and noted rudder trim full nose left. Pilot flying (first officer) disconnected autopilot and overrode runaway. Pilot not flying (captain) re-centered rudder trim per QRH and re-engaged autopilot. After landing; contract maintenance did a check of the afcs fault codes (none noted) and an operational test of the rudder trim system. After checks complete; aircraft signed off ok for service. I exercised captain's authority and refused to fly the aircraft since there was no indication of why it happened and no guarantees that it would not happen again.
Original NASA ASRS Text
Title: A CRJ-700 rudder trim deflected full left with the autopilot engaged; so the QRH was completed; the rudder re-centered and the flight continued but the Captain refused the aircraft for further service after Maintenance found no faults.
Narrative: At FL350; straight and level cruise with autopilot engaged. Aircraft began a roll to the right. Crew noticed rudder brick off center. Scanned instruments and noted rudder trim full nose left. Pilot flying (First Officer) disconnected autopilot and overrode runaway. Pilot not flying (Captain) re-centered rudder trim per QRH and re-engaged autopilot. After landing; Contract Maintenance did a check of the AFCS fault codes (none noted) and an operational test of the rudder trim system. After checks complete; aircraft signed off OK for service. I exercised Captain's authority and refused to fly the aircraft since there was no indication of why it happened and no guarantees that it would not happen again.
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.