ASN Wikibase Occurrence # 354067
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| Date: | Thursday 23 July 1998 |
| Time: | 20:00 LT |
| Type: |  Enstrom F28A |
| Owner/operator: | Private |
| Registration: | N288Q |
| MSN: | 298 |
| Total airframe hrs: | 1088 hours |
| Engine model: | Lycoming HIO-360-CIA |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Pleasanton, CA -
 United States of America
|
| Phase: | Landing |
| Nature: | Training |
| Departure airport: | San Jose, CA (KRHV) |
| Livermore, CA (KLVK) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The dual student performed an off-airport pinnacle landing. The CFI stated that the helicopter began to vibrate and moved sideways so he rolled on power. By the time the helicopter reached the edge of the landing area, the rpm had decreased and he could not reposition the aircraft. The CFI reported that he pedal-turned so that the tail was pointing downhill, lowered the collective, and rolled off the throttle. The helicopter slid approximately 300 feet off the top of the hill and down a 30-degree slope. The main rotor blades contacted the ground but the aircraft remained upright. The CFI reported that there were no mechanical malfunctions with the aircraft prior to the accident.
Probable Cause: The flight instructor's delayed remedial action and the student pilot's failure to maintain rotor RPM. A factor was the downhill terrain.
Accident investigation:
 |
|
Sources:
NTSB LAX98LA242
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Mar-2024 18:40 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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