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Flight crew of an light transport turboprop had a runaway pitch trim causing a gain of 2000 ft to regaining control of aircraft pitch.
| Attributes | |
| ACN | 331672 |
| Time | |
| Date | 199603 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : cht |
| State Reference | MO |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | SA-227 AC Metro III |
| Operating Under FAR Part | Part 135 |
| Flight Phase | descent other |
| Route In Use | enroute airway : zau |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 140 flight time total : 2500 flight time type : 250 |
| ASRS Report | 331672 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 6300 flight time type : 2400 |
| ASRS Report | 331951 |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude other anomaly other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : regained aircraft control flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
At start of descent captain trimmed airplane for descent. Airplane had trim runaway full up. After switching trims from captain to copilot control was regained, but not before gaining 2000 ft of altitude and losing airspeed to 120 KIAS.
Original NASA ASRS Text
Title: FLC OF AN LTT TURBOPROP HAD A RUNAWAY PITCH TRIM CAUSING A GAIN OF 2000 FT TO REGAINING CTL OF ACFT PITCH.
Narrative: AT START OF DSCNT CAPT TRIMMED AIRPLANE FOR DSCNT. AIRPLANE HAD TRIM RUNAWAY FULL UP. AFTER SWITCHING TRIMS FROM CAPT TO COPLT CTL WAS REGAINED, BUT NOT BEFORE GAINING 2000 FT OF ALT AND LOSING AIRSPD TO 120 KIAS.
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.