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ASN Wikibase Occurrence # 201101
Last updated: 15 September 2021
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Date:07-NOV-2017
Time:09:34
Type:Silhouette image of generic H500 model; specific model in this crash may look slightly different
Hughes 369D
Owner/operator:Winco, Inc.
Registration: N138WH
MSN: 911027D
Fatalities:Fatalities: 2 / Occupants: 3
Other fatalities:0
Aircraft damage: None
Category:Accident
Location:Calcasieu Parish north of Sulphur, LA -   United States of America
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Nature:External load operation
Departure airport:Sulphur, LA
Destination airport:Sulphur, LA
Investigating agency: NTSB
Narrative:
The commercial pilot was conducting an external load flight with two linemen hoisted beneath the helicopter on a long line. The pilot reported that, as he maintained a hover over the power lines, the long line contacted the shield wire as one of the linemen held onto a conductor bundle. The long line severed about midspan as the pilot turned the helicopter into the wind and attempted to move the linemen away from the conductor bundle. The two linemen were fatally injured when they fell about 100 ft to the ground. The pilot returned to the landing zone and landed uneventfully.
The pilot did not report any preimpact mechanical malfunctions or failures with the helicopter that would have precluded normal operation. Video footage of the accident confirmed that the helicopter's synthetic long line severed after extended lateral contact with the braided steel shield wire.


Probable Cause: The pilot's failure to maintain adequate separation between a long line being used to hoist linemen from a shield wire during an external load flight, which resulted in the long line being severed.

Sources:

NTSB
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=138WH
https://www.kplctv.com/story/36784688/authorities-confirmed-two-contractors-are-dead-following-an-accident-in-sulphur/
http://aerossurance.com/helicopters/fatal-h369-powerline-hec/

Accident investigation:
cover
  
Investigating agency: NTSB
Status: Investigation completed
Duration: 2 years
Download report: Final report
Location

Media:


Revision history:

Date/timeContributorUpdates
08-Nov-2017 23:28 Geno Added
09-Nov-2017 09:00 Aerossurance Updated [Nature, Narrative]
24-Nov-2017 00:24 Aerossurance Updated [Time, Nature, Departure airport, Destination airport, Source, Narrative]
11-Nov-2019 17:40 ASN Update Bot Updated [Time, Operator, Source, Narrative, Accident report, ]
26-Dec-2019 11:53 Aerossurance Updated [Source, Embed code, Narrative]
27-Dec-2019 10:36 Aerossurance Updated [Source, Embed code]
27-Dec-2019 11:32 Aerossurance Updated [Embed code]

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