ASN Wikibase Occurrence # 354913
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| Date: | Friday 26 December 1997 |
| Time: | 15:14 LT |
| Type: |  Robinson R-22 BETA |
| Owner/operator: | Private |
| Registration: | N8015V |
| MSN: | 0996 |
| Year of manufacture: | 1989 |
| Total airframe hrs: | 4672 hours |
| Engine model: | Lycoming O-320-E26 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Riverside, PA -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | (8N8) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot stated the helicopter was approximately 800 feet above ground level, climbing 300 feet-per-minute at 60 knots airspeed, when he heard the low rotor RPM warning horn and saw the corresponding low RPM warning light. The pilot said he entered autorotation '...with a nasty tailwind.' The pilot selected an open field for a forced landing site, determined he would overshoot, but continued straight ahead into trees. Prior to entering the trees that bordered the field, the pilot '...attempted to roll on throttle but got no response.' According to a manufacturer's Safety Notice: 'No matter what causes the low rotor RPM, the pilot must first roll on throttle and lower collective simultaneously to recover RPM before investigating the problem.' The pilot reported there were no mechanical deficiencies prior to the low RPM warning and the engine ran to manufacturer's specification after the accident. According to an icing probability chart published by the FAA, atmospheric conditions at the time of the accident were conducive to '...serious icing at cruise power.'
Probable Cause: the pilot's improper response to the low rotor RPM warning. Factors in the accident were the pilot's failure to turn for the forced landing area and the carburetor icing conditions.
Accident investigation:
 |
|
Sources:
NTSB NYC98LA053
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 12-Mar-2024 06:05 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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