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PC12 flight crew reported they received a 'trim runaway' on the crew alerting system during rotation. The trim system continued to trim up.
| Attributes | |
| ACN | 1356286 |
| Time | |
| Date | 201605 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | PC-12 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Initial Climb |
| Route In Use | None |
| Flight Plan | VFR |
| Component | |
| Aircraft Component | Horizontal Stabilizer Trim |
| Person 1 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 230 Flight Crew Total 2250 Flight Crew Type 1700 |
| Person 2 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Instrument Flight Crew Multiengine Flight Crew Flight Instructor Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 200 Flight Crew Total 5520 Flight Crew Type 115 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
Upon rotation and captain call for gear up the trim runaway cas (crew alerting system) message and aural warning came on. The captain interrupted the trim and we immediately let unicom know we were [in an emergency situation] and coming back to land. When we tried to trim back nose down it stopped the trim from going up but as soon as the trim switch on the yoke was released it continued to trim up. I as the first officer had to help the captain land the aircraft due to strong control forces. Landing was uneventful and taxied into the ramp.
Original NASA ASRS Text
Title: PC12 flight crew reported they received a 'Trim Runaway' on the Crew Alerting System during rotation. The trim system continued to trim up.
Narrative: Upon rotation and Captain call for gear up the trim runaway CAS (Crew Alerting System) message and aural warning came on. The captain interrupted the trim and we immediately let UNICOM know we were [in an emergency situation] and coming back to land. When we tried to trim back nose down it stopped the trim from going up but as soon as the trim switch on the yoke was released it continued to trim up. I as the First Officer had to help the Captain land the aircraft due to strong control forces. Landing was uneventful and taxied into the ramp.
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.