ASN Wikibase Occurrence # 35164
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| Date: | Thursday 28 May 1987 |
| Time: | 16:30 |
| Type: | Hiller UH-12E Soloy |
| Owner/operator: | Olympic Air |
| Registration: | N28875 |
| MSN: | 2143 |
| Total airframe hrs: | 12094 hours |
| Engine model: | ALLISON 250-C20 |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Shelton, WA -
 United States of America
|
| Phase: | En route |
| Nature: | Ferry/positioning |
| Departure airport: | Silverdale, WA (S42) |
| Shelton, WA (SHN) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT WAS PROPERLY CERTIFICATED FOR THE FLIGHT; HOWEVER, DUE TO OPERATOR INSURANCE RESTRICTIONS, ALL PRIOR COMMERCIAL FLIGHTS HAD REQUIRED THE OWNER/OPERATOR TO ACCOMPANY THIS PILOT, THEREFORE THIS WAS THE PILOT'S FIRST COMMERCIAL FLIGHT AS SOLE PILOT. RETURNING TO BASE AFTER A ROUND-TRIP PASSENGER FLIGHT, HAVING DISEMBARKED PASSENGERS, THE AIRCRAFT WAS OBSERVED PROCEEDING AT HIGH FORWARD SPEED IN STRONG BUT INTERMITTENT WIND CONDITIONS. ALSO, PASSENGERS REMARKED ABOUT TURBULENCE ALONG THIS SAME ROUTE OF FLIGHT EARLIER. INVESTIGATION REVEALED THE MAIN ROTOR SEPARATED IN FLIGHT DUE TO MAST BUMPING, A PHENOMENON ASSOCIATED WITH TEETERING ROTOR SYSTEMS, INDUCED BY EXCEEDING THE NORMAL FLIGHT ENVELOPE FOR THE AIRCRAFT. CAUSE:
Sources:
NTSB: https://www.ntsb.gov/ntsb/brief.asp?ev_id=20001213X31041
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
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