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B737 flight crew reported diverting to an alternate airport after experiencing a stabilizer trim runaway.
| Attributes | |
| ACN | 1478908 |
| Time | |
| Date | 201709 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B737 Next Generation Undifferentiated |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Horizontal Stabilizer Trim |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Type 7437 |
| Person 2 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Type 7124 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
Normal departure until cleaning up the flaps and slats. After everything was up; got master caution; flight controls; speed trim fail lights. At the same time the aircraft started slow trimming nose up. I was able to counter the movement with the trim switch on the yoke. Kept the speed at 250 and continued the departure so that we could run the non-normal checklist. After turning off the two guarded trim switches below and to the right of the throttles; the runaway condition stopped. Down to manual trim. We [advised ATC] and ATC leveled us off at FL240 and turned us back to [an alternate airport] per our request to divert there. Contacted the company; briefed the flight attendants and passengers. Made a smooth; uneventful overweight landing.
Original NASA ASRS Text
Title: B737 flight crew reported diverting to an alternate airport after experiencing a stabilizer trim runaway.
Narrative: Normal departure until cleaning up the flaps and slats. After everything was up; got master caution; flight controls; speed trim fail lights. At the same time the aircraft started slow trimming nose up. I was able to counter the movement with the trim switch on the yoke. Kept the speed at 250 and continued the departure so that we could run the non-normal checklist. After turning off the two guarded trim switches below and to the right of the throttles; the runaway condition stopped. Down to manual trim. We [advised ATC] and ATC leveled us off at FL240 and turned us back to [an alternate airport] per our request to divert there. Contacted the Company; briefed the Flight Attendants and passengers. Made a smooth; uneventful overweight landing.
Data retrieved from NASA's ASRS site 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.