ASN Wikibase Occurrence # 215635
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| Date: | Saturday 31 October 2009 |
| Time: | day |
| Type: |  Robinson R22 Beta |
| Owner/operator: | Silverhawk Aviation Academy |
| Registration: | N74607 |
| MSN: | 3949 |
| Year of manufacture: | 2005 |
| Total airframe hrs: | 4176 hours |
| Engine model: | Lycoming O-360 SERIES |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Location: | Marsing, Owyhee County, Idaho -
 United States of America
|
| Phase: | Approach |
| Nature: | Training |
| Departure airport: | Boise Airport (Gowen Field), Boise, Idaho (BOI/KBOI) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Substantially damaged October 31, 2009 when crashed at Marsing, Owyhee County, Idaho (at approximate co ordinates 43°32′44″N 116°48′28″W) during a training flight. According to the official NTSB report into the accident:
"The flight instructor reported that during a flight review, the pilot being reviewed was performing a pinnacle approach to landing at a selected site between 3,500 feet to 4,000 feet mean sea level. During the approach, the helicopter was descending at a rate of about 400 feet per minute and a forward speed of 30 knots. The pilot stated that the helicopter was passing through translational lift and that it seemed like it was taking more power.
The flight instructor called for a go-around due to the indicated airspeed and the high sink rate. The instructor stated, “Upon initiating the go-around we experienced lack of power, decreased rotor rpm, and an increased sink rate.” Both occupants reported that they pulled their collectives up to cushion the landing, however, the touchdown was hard. The helicopter tipped forward onto its nose and rolled onto its left side.
The landing skids were spread and bent, the main rotor blades remained attached, but were bent, and the tail boom was bent. The flight instructor reported that there were no mechanical anomalies with the helicopter prior to the accident.
The National Transportation Safety Board determines the probable cause(s) of this accident as follows: The pilot's failure to maintain adequate main rotor rpm during the approach and subsequent go-around and the certified flight instructor's inadequate supervision of the flight
Accident investigation:
 |
|
Sources:
NTSB
2. FAA Registration: https://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N74607
3. http://helihub.com/2009/10/31/31-oct-09-n74607-robinson-r22-marsing-us-idado/
4. https://en.wikipedia.org/wiki/Marsing,_Idaho
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Sep-2018 18:40 | Dr.John Smith | Added |
Corrections or additions? ... Edit this accident description
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