ASN Wikibase Occurrence # 354713
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| Date: | Saturday 14 March 1998 |
| Time: | 17:40 LT |
| Type: |  Robinson R22 BETA |
| Owner/operator: | Helipro Inc. |
| Registration: | N4079M |
| MSN: | 1816 |
| Year of manufacture: | 1991 |
| Total airframe hrs: | 2901 hours |
| Engine model: | Lycoming O-320-B2C |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | San Luis Obispo, CA -
 United States of America
|
| Phase: | Approach |
| Nature: | Training |
| Departure airport: | San Luis Obispo, CA (SBP |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The flight instructor reported that he and the dual student were doing traffic pattern operations to a grass area parallel to runway 29. The CFI stated that while they were on the downwind leg of the first pattern about 500 feet agl, the student was on the controls and was preparing for the approach with the prelanding checklist. The student reached down to apply carburetor heat, but instead pulled the mixture to idle. The engine stopped and the instructor then took over the controls and performed an autorotation to the grass field. The helicopter continued forward on the ground after the touchdown and the front portion of the skids became imbedded in the ground and the helicopter then nosed over. The blades hit the ground and the helicopter rolled over and came to rest on its right side.
Probable Cause: The student pilot's inadvertent pulling of the mixture, instead of the carburetor heat, while preparing for the approach, and the flight instructor's inadequate supervision.
Accident investigation:
 |
|
Sources:
NTSB LAX98LA115
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 11-Mar-2024 17:32 | ASN Update Bot | Added |
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