ASN Wikibase Occurrence # 132456
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Saturday 19 August 1989 |
| Time: | 09:10 |
| Type: |  Aérospatiale AS 350D |
| Owner/operator: | Papillon Hawaiian Tours |
| Registration: | N35970 |
| MSN: | 1131 |
| Total airframe hrs: | 8833 hours |
| Fatalities: | Fatalities: 0 / Occupants: 7 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Volcano, Hawaii County, District of Puna, Hawaii -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | Waikoloa, Hawaii |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE VFR SIGHT-SEEING FLIGHT WAS BEING CONDUCTED UNDER 14 CFR 135. WHILE DESCENDING INTO A MOUNTAINOUS AREA THE PILOT FELT A SEVERE VIBRATION ABOUT 10-15 SECONDS BEFORE THE ENGINE FAILED. THE PILOT EXECUTED AN AUTOROTATION IN THE UPWARD SLOPING TERRAIN AND THE HELICOPTER ROLLED-OVER ON TOUCHDOWN.
THE ENGINE EXAM DISCLOSED THAT THE POWER TURBINE SHAFT AND THE NOS. 2 & 3 BEARINGS FAILED DUE TO OIL STARVATION AND DISPLAYED EXTREME HIGH TEMPERATURE DISTRESS. THE CHIP DETECTOR O-RING SEAL WAS EXCESSIVELY WORN. OIL RESIDUE STREAKING WAS FOUND ON THE OUTSIDE OF THE FUSELAGE/ TAILCONE ASSEMBLY AND THE VERTICAL/HORIZONTAL STABILIZERS
PROBABLE CAUSE:A CATASTROPHIC FAILURE OF THE POWER TURBINE SHAFT AND BEARINGS. THE FAILURE WAS A RESULT OF OIL STARVATION DUE TO AN EXCESSIVELY WORN CHIP DETECTOR O-RING SEAL, INADEQUATE MAINTENANCE AND PRE-FLIGHT. CONTRIBUTING FACTOR(S) WAS: THE MOUNTAINOUS TERRAIN.
Sources:
1. FAA: https://www.ntsb.gov/aviationquery/brief.aspx?ev_id=20001213X29162&key=1
2. NTSB: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?omni=Home-N-Number&nNumberTxt=35970
3. http://www.griffin-helicopters.co.uk/accidentdetails.aspx?accidentkey=11560
4. [LINK NOT WORKING ANYMORE:http://coptercrazy.brinkster.net/search/se350show.asp?start=101&count=50]
5. https://en.wikipedia.org/wiki/Volcano,_Hawaii
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 30-Jun-2014 20:47 | Dr. John Smith | Updated [Time, Location, Nature, Departure airport, Source, Narrative] |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation