ASN Wikibase Occurrence # 43436
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| Date: | Saturday 14 September 1985 |
| Time: | 09:30 |
| Type: |  Aérospatiale SA 315B Lama |
| Owner/operator: | Ron & Penny Livingston |
| Registration: | N3836E |
| MSN: | 2571 |
| Total airframe hrs: | 2751 hours |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Craig, CO -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | Craig, CO |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE HELICOPTER WAS LONG-LINING A 1280-POUND AIR COMPRESSOR TO AN 8500-FOOT MSL MOUNTAIN DRILLING SITE. WITNESSES HEARD A SQUEALING SOUND AND BANG. THEY OBSERVED GRAY-WHITE SMOKE AND ORANGE-BLUE FLAME EMITTING FROM THE EXHAUST. THE PLT RELEASED THE LOAD AND ATTEMPTED TO MAKE A FORCED LANDING IN A NEARBY CLEARING. THE HELICOPTER COLLIDED WITH TREES AND CRASHED. DISASSEMBLY OF THE ENG REVEALED THAT ALL SIX SCREWS IN THE DIFFUSER LABYRINTH SEAL WERE LOOSE. ONE SCREW HAD BACKED OUT AHD HAD SCORED THE BACK OF THE CENTRIFUGAL COMPRESSOR. THE SCREW HAD ROTATED 180 DEGREES AND WAS BENT OPPOSITE THE COMPRESSOR'S DIRECTION OF ROTATION. THE HOLE WAS ELONGATED. CAUSE:
Sources:
NTSB: http://www.ntsb.gov/ntsb/brief.asp?ev_id=20001214X37762
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:24 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
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