ASN Wikibase Occurrence # 365371
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| Date: | Sunday 5 May 1991 |
| Time: | 11:29 LT |
| Type: |  Hughes 369HS |
| Owner/operator: | Gerardin Corp. |
| Registration: | N9219F |
| MSN: | 940638S |
| Year of manufacture: | 1974 |
| Engine model: | Allison 250-C20 |
| Fatalities: | Fatalities: 0 / Occupants: 5 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Keanae, HI -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | Kahului, HI (OGG) |
| Kahului, HI (OGG) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
DURING AN AIR TAXI SIGHTSEEING FLIGHT THE PILOT EXPERIENCED A SUDDEN TOTAL LOSS OF ALL ENGINE POWER. THE PILOT MADE A FORCED LANDING AND COLLIDED WITH TREES. EXAM OF THE HELICOPTER'S ENGINE REVEALED THE FORWARD SPLINES ON THE SPUR ADAPTER GEARSHAFT HAD FAILED IN FATIGUE WHICH RESULTED IN THE SAG BEING DISCONNECTED FORM THE DRIVE SYSTEM. METALLURGICAL EXAM OF THE FAILED SAG REVEALED IT CONFORMED TO ITS MANUFACTURER'S DESIGN SPECIFICATIONS. THE COMPRESSOR, AND THE SAG, WERE SUBJECT TO AN OVERHAUL 826.8 OPERATIONAL HOURS PRIOR TO THE ACCIDENT.
Probable Cause: THE TOTAL FAILURE IN FATIGUE OF THE HELICOPTER'S SPUR ADAPTER GEARSHAFT. A CONTRIBUTING FACTOR WAS RELATED TO THE LACK OF A SUITABLE EMERGENCY LANDING SITE.
Accident investigation:
 |
|
Sources:
NTSB LAX91LA198
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 20-Mar-2024 09:26 | ASN Update Bot | Added |
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