ASN Wikibase Occurrence # 288897
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| Date: | Monday 29 August 2011 |
| Time: | 12:15 LT |
| Type: |  Enstrom F-28F |
| Owner/operator: | Enstrom Helicopter Corp |
| Registration: | N228F |
| MSN: | 819 |
| Year of manufacture: | 2007 |
| Total airframe hrs: | 232 hours |
| Engine model: | Lycoming HIO-360-F1AD |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Menominee, Michigan -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Test |
| Departure airport: | Menominee Marinette Twin County Airport, MI (KMNM) |
| Menominee Marinette Twin County Airport, MI (KMNM) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
According to the pilot, the purpose of the company test flight was to measure collective stick forces with the collective bias disabled. The pilot, who was the helicopter's only occupant, lifted the helicopter into a hover and then hovered clear of any obstacles. He reported that the collective controls were heavy, as expected, but the helicopter was very controllable. During his attempt to position a force gauge between his hand and the collective grip, the pilot lost control of the helicopter and it landed hard onto the ramp. The helicopter's tail rotor blades impacted the ramp and the helicopter came to rest upright. A postaccident examination of the helicopter showed that the tail rotor blades were bent and the tail rotor driveshaft was sheared. The pilot reported that he should have taken an observer or other personnel on the flight to assist while he concentrated on flying the helicopter.
Probable Cause: The pilot's failure to maintain control of the helicopter during a hover.
Accident investigation:
 |
|
Sources:
NTSB CEN11CA638
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 05-Oct-2022 07:27 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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