ASN Wikibase Occurrence # 364259
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| Date: | Saturday 9 November 1991 |
| Time: | 11:45 LT |
| Type: |  Bell 206B |
| Owner/operator: | Kona Helicopters |
| Registration: | N16712 |
| MSN: | 2181 |
| Total airframe hrs: | 13499 hours |
| Engine model: | Allison 250-C20 |
| Fatalities: | Fatalities: 0 / Occupants: 5 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Hilo, HI -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Unknown |
| Departure airport: | Waikoloa, HI (HI07) |
| Hilo, HI (ITO) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
ACCORDING TO THE PILOTS STATEMENT, AS THE HELICOPTER FLEW OVER A SADDLE PASS IN A MOUNTAIN AREA THE FLIGHT ENCOUNTERED CLOUDS WHICH RAPIDLY CLOSED DOWN ON AND AROUND THE AIRCRAFT. THE PILOT SAID 'I HAD NO CHOICE BUT TO SLOW DOWN AND TRY TO TURN AROUND WITHOUT GETTING INTO THE LOW CLOUDS THAT WERE MOVING IN.' AS THE AIRCRAFT SLOWED, IT SUDDENLY BEGAN TO ROTATE TO THE RIGHT. THE PILOT WAS UNABLE TO CORRECT THE YAW WITH LEFT PEDDLE INPUT AND AFTER THREE REVOLUTIONS THE LOW ROTOR RPM HORN SOUNDED. THE PILOT SAID THAT SHE FELT THE HELICOPTER CONTROL DIMINISH AND SHE ELECTED TO PUT THE HELICOPTER DOWN ON THE GROUND. AT AN ALTITUDE OF ABOUT 6 FEET THE PILOT LOWERED THE COLLECTIVE AND THE HELICOPTER LANDED HARD IN A LEVEL ATTITUDE.
Probable Cause: THE INADVERTENT ENCOUNTER WITH A LOSS OF TAIL ROTOR EFFECTIVENESS PHENOMENA AND THE RESULTANT PILOT INFLIGHT LOSS OF CONTROL.
Accident investigation:
 |
|
Sources:
NTSB LAX92LA041
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 19-Mar-2024 13:16 | ASN Update Bot | Added |
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