ASN Wikibase Occurrence # 284543
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| Date: | Tuesday 24 July 2007 |
| Time: | 07:45 LT |
| Type: |  Robinson R22 Beta II |
| Owner/operator: | Silver State Helicopters LLC |
| Registration: | N147SH |
| MSN: | 4137 |
| Year of manufacture: | 2007 |
| Total airframe hrs: | 298 hours |
| Engine model: | Lycoming O-360-J2A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Boise, ID -
 United States of America
|
| Phase: | Unknown |
| Nature: | Training |
| Departure airport: | Boise, ID |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The flight instructor reported that during their fifth practice autorotation, the student let the rotor rpm decay to the point that the certified flight instructor (CFI) attempted to intercede and perform a run on landing. The student and CFI both struggled with each other on the controls until the helicopter hit the ground hard. During the impact sequence, the helicopter spun around, and ultimately came to rest on the left side.
Probable Cause: The student pilot's failure to maintain rotor rpm resulting in an excessive descent rate and a hard landing. Factors in the accident were the student's failure to relinquish the controls, and the CFI's inadequate supervision.
Accident investigation:
 |
|
Sources:
NTSB LAX07CA229
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 30-Sep-2022 18:21 | ASN Update Bot | Added |
| 16-Sep-2023 20:17 | Ron Averes | Updated |
Corrections or additions? ... Edit this accident description
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