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An HU500E tail rotor made ground contact when the aircraft was tipped backward following a runaway lateral trim failure.
| Attributes | |
| ACN | 740825 |
| Time | |
| Date | 200705 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl bound lower : 0 agl bound upper : 900 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | MD Helicopter 500/C/D/E/L |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | None |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : private pilot : instrument |
| Experience | flight time last 90 days : 120.2 flight time total : 2337.5 flight time type : 133.9 |
| ASRS Report | 740825 |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : unable |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance |
| Primary Problem | Aircraft |
Narrative:
During a part 91 pleasure flight I experienced a runaway lateral trim failure. A precautionary landing was made in an open field to assess the failure. After set down; full down collective was applied and power was reduced to flight idle. Within a few seconds the aircraft settled and rocked backwards in soft terrain which caused a tail rotor strike.
Original NASA ASRS Text
Title: AN HU500E TAIL ROTOR MADE GND CONTACT WHEN THE ACFT WAS TIPPED BACKWARD FOLLOWING A RUNAWAY LATERAL TRIM FAILURE.
Narrative: DURING A PART 91 PLEASURE FLT I EXPERIENCED A RUNAWAY LATERAL TRIM FAILURE. A PRECAUTIONARY LNDG WAS MADE IN AN OPEN FIELD TO ASSESS THE FAILURE. AFTER SET DOWN; FULL DOWN COLLECTIVE WAS APPLIED AND PWR WAS REDUCED TO FLT IDLE. WITHIN A FEW SECONDS THE ACFT SETTLED AND ROCKED BACKWARDS IN SOFT TERRAIN WHICH CAUSED A TAIL ROTOR STRIKE.
Data retrieved from NASA's ASRS site as of January 2009 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.