ASN Wikibase Occurrence # 21727
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| Date: | Monday 16 June 2008 |
| Time: | 18:30 |
| Type: |  Robinson R22 Beta |
| Owner/operator: | Hillsboro Aviation Inc. |
| Registration: | N4000Y |
| MSN: | 1367 |
| Year of manufacture: | 1990 |
| Engine model: | Lycoming O-320 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Marys Peak, Benton County, SW of Philomath, Oregon -
 United States of America
|
| Phase: | Approach |
| Nature: | Training |
| Departure airport: | Corvallis, OR (CVO) |
| Troutdale, OR (TTD) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The flight instructor reported that he was flying an instructional cross-country flight with a student. They stopped for fuel at an airport near sea level and were returning to their home base. When they departed, the wind was from 300 degrees at 16 knots, gusting to 20 knots. They decided to do a pinnacle landing to a 4,060-foot mountain. As the student approached the peak for landing, a downdraft was encountered. The main rotor disk low rpm indicators activated, and the flight instructor took the controls and attempted to salvage the situation. The helicopter's landing skid impacted terrain, and the aircraft rolled twice down the mountain. The flight instructor and student exited with minor injuries.
Probable Cause: The student pilot's failure to maintain rotor rpm during a pinnacle approach and the flight instructor's delayed remedial action and inadequate supervision of the flight. Contributing to the accident was the downdraft weather condition.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: 2. FAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=4000Y
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 12-Jul-2008 23:20 | Fusko | Added |
| 30-Sep-2016 19:15 | Dr.John Smith | Updated [Operator, Location, Source, Narrative] |
| 30-Sep-2016 19:28 | Dr.John Smith | Updated [Location, Departure airport, Destination airport, Source, Narrative] |
| 21-Dec-2016 19:14 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 21-Dec-2016 19:16 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 21-Dec-2016 19:20 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 03-Dec-2017 11:19 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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