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A B737-900 in climb at 10000 ft declared an emergency and diverted due to unable to trim left rudder. Right trim ok. Caused by failed pedestal trim switch.
| Attributes | |
| ACN | 618890 |
| Time | |
| Date | 200405 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : zzz1.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737-900 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure sid : n/s |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 215 flight time total : 7000 flight time type : 3000 |
| ASRS Report | 618890 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance flight crew : diverted to another airport flight crew : declared emergency |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance Flight Crew Human Performance |
| Primary Problem | Aircraft |
Narrative:
Rudder trim failed during climb. Would trim right, but not left. After evaluating the situation, the decision was made to divert to ZZZ. We declared an emergency due to the flight control failure. We elected to land approximately 1000 pounds. Overweight. Landed without incident. Callback conversation with reporter revealed the following information: the reporter stated the loss of left rudder trim was caused by a failed rudder trim switch located on the pedestal. The reporter said the right rudder trim was normal.
Original NASA ASRS Text
Title: A B737-900 IN CLB AT 10000 FT DECLARED AN EMER AND DIVERTED DUE TO UNABLE TO TRIM L RUDDER. R TRIM OK. CAUSED BY FAILED PEDESTAL TRIM SWITCH.
Narrative: RUDDER TRIM FAILED DURING CLB. WOULD TRIM R, BUT NOT L. AFTER EVALUATING THE SIT, THE DECISION WAS MADE TO DIVERT TO ZZZ. WE DECLARED AN EMER DUE TO THE FLT CTL FAILURE. WE ELECTED TO LAND APPROX 1000 LBS. OVERWEIGHT. LANDED WITHOUT INCIDENT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE LOSS OF L RUDDER TRIM WAS CAUSED BY A FAILED RUDDER TRIM SWITCH LOCATED ON THE PEDESTAL. THE RPTR SAID THE R RUDDER TRIM WAS NORMAL.
Data retrieved from NASA's ASRS site as of July 2007 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.