ASN Wikibase Occurrence # 298242
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| Date: | Saturday 1 December 2001 |
| Time: | 10:30 LT |
| Type: |  Bell 47G |
| Owner/operator: | Versatile Helicopters, Inc. |
| Registration: | N5226 |
| MSN: | 37 |
| Year of manufacture: | 1947 |
| Total airframe hrs: | 15438 hours |
| Engine model: | Franklin 6A-355-B1 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Ardmore, Oklahoma -
 United States of America
|
| Phase: | Unknown |
| Nature: | Training |
| Departure airport: | Ardmore, OK (1F0) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The student pilot had completed three power recovery autorotations to the south, and the flight instructor was to demonstrate a "full touchdown autorotation" to end the training session. The flight instructor initiated the autorotation at 1,500 feet msl and 60 knots to the airport's mid-field median. After slowing to 40 knots, the instructor began a flare to reduce the airspeed to 15-20 knots. At 10 feet agl, he pulled collective to cushion the landing. The helicopter touched down on the soft grassy area and slid for approximately 10 feet before starting to nose over. "The tail of the helicopter pitched upward into the blades, severing it." The helicopter rotated left approximately 270 degrees before coming to rest upright. The flight instructor stated that "weather had saturated the ground and caused the sod to be soft on the usual landing area. It was not visible from the helicopter."
Probable Cause: the flight instructor's selection of an unsuitable area for practicing a full touchdown autorotation, which resulted in a nose over. A contributing factor was the soft ground.
Accident investigation:
 |
|
Sources:
NTSB FTW02LA044
History of this aircraft
Other occurrences involving this aircraft
| 25 May 1976 | N117B | Tmb,Inc. | 1 | near Birchwood, AK | |
sub |
| 7 December 1984 | N5226 | R.s. Hickman Versitol Helicop. | 0 | Ardmore, OK | |
sub |
| 26 April 1996 | N5226 | Versatile Aviation, Inc. | 0 | Ardmore, OK | |
sub |
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Oct-2022 15:43 | ASN Update Bot | Added |
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