ASN Wikibase Occurrence # 360210
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| Date: | Thursday 7 July 1994 |
| Time: | 16:30 LT |
| Type: |  Hughes 369HS |
| Owner/operator: | Private |
| Registration: | N9242F |
| MSN: | 07035 |
| Total airframe hrs: | 14125 hours |
| Engine model: | Allison250-C20 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Gilbert Islands, PO -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Survey |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT WAS ORBITING THE FISHING VESSEL WHEN HE HEARD A LOUD 'BANG.' HE SAID THE AIRCRAFT PITCHED FORWARD AND BEGAN AN UNCOMMANDED SPIN TO THE RIGHT. HE LOWERED COLLECTIVE AND INITIATED AN EMERGENCY AUTOROTATION TO THE WATER. HE HAD DIFFICULTY IN MAINTAINING CONTROL OF THE AIRCRAFT AND THE AIRCRAFT LANDED HARD. A POSTACCIDENT INSPECTION REVEALED THE ANTI-TORQUE ROTOR AND HUB WERE MISSING FROM THE AIRCRAFT. WITNESSES REPORTED THAT THEY SAW THE ANTI-TORQUE BLADES AND HUB SEPARATE AS A UNIT JUST PRIOR TO THE ACCIDENT. THE PILOT REPORTED THAT HIS PREVIOUS INSPECTIONS HAD NOT DETECTED ANY INDICATIONS OF A VOID ON EITHER BLADE, AND THAT THE AIRCRAFT WAS IN COMPLIANCE WITH APPLICABLE AIRWORTHINESS DIRECTIVES AND SERVICE INFORMATION NOTICES. A LABORATORY INSPECTION OF THE REMAINING PORTION OF THE ANTI-TORQUE SYSTEM GEARBOX FAILED TO REVEAL ANY INDICATIONS OF PREEXISTING CRACKS ON THE FRACTURE.
Probable Cause: AN IN FLIGHT FAILURE AND SEPARATION OF THE TAIL ROTOR FOR UNDETERMINED REASONS.
Accident investigation:
 |
|
Sources:
NTSB LAX94LA285
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Mar-2024 19:04 | ASN Update Bot | Added |
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