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ASN Wikibase Occurrence # 42583
Last updated: 25 March 2019
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Date:08-AUG-1985
Time:12:15
Type:Silhouette image of generic UH1 model; specific model in this crash may look slightly different
Bell UH-1B
Owner/operator:Skyline Air Service
Registration: N1385W
C/n / msn: 62-2072
Fatalities:Fatalities: 1 / Occupants: 1
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:St. James, LA -   United States of America
Phase: En route
Nature:Unknown
Departure airport:
Destination airport:
Investigating agency: NTSB
Narrative:
ACFT WAS AT A 150' HOVER PREPARING TO PICK UP A LOG WHEN IT EXPERIENCED A POWER LOSS. WITNESSES STATED THAT THEY HEARD A LOUD 'BANG' AND THE PILOT RADIOED 'GET OUT OF THE WAY'. ACFT AUTOROTATED THRU 60' TO 80' TREES WITH VERY LOW ROTOR RPM AND IMPACTED WITH NO HORZ SPEED AND HIGH VERTICAL SPEED. INVESTIGATION REVEALED THAT ENG HAD EXPERIENCED SEVERE INTERNAL DAMAGE. FOUR COMPRESSOR BLADES FROM THE 4TH STAGE ROTOR WERE FOUND TO HAVE SUFFERED PROGRESSIVE FATIGUE FAILURE, WHICH IN TURN CAUSED THE REMAINDER OF THE BLADES ON THE 4TH AND 5TH STAGES TO SEPARATE LEADING TO AN ENG SURGE AND LOSS OF POWER. THE ACCIDENT OCCURRED IN A FLT REGIME FROM WHICH THE PLT COULD NOT AFFECT A RECOVERY FROM THE ENG FAILURE. CAUSE:

Sources:

NTSB: http://www.ntsb.gov/ntsb/brief.asp?ev_id=20001214X37470


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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