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ASN Wikibase Occurrence # 43436
Last updated: 18 December 2020
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Date:14-SEP-1985
Time:09:30
Type:Silhouette image of generic LAMA model; specific model in this crash may look slightly different
Aérospatiale SA 315B Lama
Owner/operator:Ron & Penny Livingston
Registration: N3836E
C/n / msn: 2571
Fatalities:Fatalities: 1 / Occupants: 1
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Craig, CO -   United States of America
Phase: En route
Nature:Unknown
Departure airport:Craig, CO
Destination airport:
Investigating agency: NTSB
Narrative:
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/timeContributorUpdates
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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