ASN Wikibase Occurrence # 361499
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| Date: | Thursday 12 August 1993 |
| Time: | 12:30 LT |
| Type: |  Enstrom F-28C |
| Owner/operator: | State Of Ohio, Bcii |
| Registration: | N51786 |
| MSN: | 450 |
| Year of manufacture: | 1978 |
| Total airframe hrs: | 1324 hours |
| Engine model: | LYCOMING HIO-360-E1AD |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Gallipolis, OH -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT ATTEMPTED A PINNACLE TAKEOFF FROM A GRASSY KNOLL. DURING THE TAKEOFF, HE ENCOUNTERED A LOW ROTOR RPM CONDITION IN WHICH THE ENGINE RPM AND MAIN ROTOR RPM DECREASED TOGETHER. THE PILOT SAID HE LOWERED THE COLLECTIVE; HOWEVER, HE WAS UNABLE TO RECOVER THE MAIN ROTOR RPM IN TIME TO PREVENT A FORCED LANDING. HE MADE A RUN ON LANDING IN A GRASSY AREA AND THE MAIN ROTOR AND TAIL ROTOR BLADES STRUCK THE GROUND. THE PASSENGER EXITED THE HELICOPTER WHILE THE MAIN ROTOR WAS STILL TURNING AND HE WAS STRUCK IN THE HEAD BY A BLADE. ACCORDING TO THE FAA BASIC HELICOPTER HANDBOOK, A CONDITION OF LOW ROTOR CAN BE CORRECTED BY REDUCING THE COLLECTIVE WHICH WILL DECREASE THE DRAG ON THE ROTOR, AND THEREFORE, INCREASE THE RPM. ACCORDING TO THE HELICOPTER MANUFACTURER, ONCE THE RPM DROPS BELOW THE NORMAL OPERATING RANGE IT COULD TAKE SEVERAL SECONDS FOR THE RPM TO RECOVER TO THE NORMAL OPERATING RANGE.
Probable Cause: The pilot's improper use of the collective and throttle which resulted in a low rotor rpm condition and a loss of control, and an inflight collision with the terrain.
Accident investigation:
 |
|
Sources:
NTSB NYC93GA151
History of this aircraft
Other occurrences involving this aircraft
| 6 October 1995 | N51786 | New Horizons Helicopters, Inc | 0 | Blue Ash, OH | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 16-Mar-2024 19:08 | ASN Update Bot | Added |
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