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ASN Wikibase Occurrence # 75234
 
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Date:23-JUN-1988
Time:16:42
Type:Silhouette image of generic S76 model; specific model in this crash may look slightly different
Sikorsky S-76A
Owner/operator:
Registration: N54C
MSN: 760116
Fatalities:Fatalities: 0 / Occupants: 6
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Moundsville, WV -   United States of America
Phase: Take off
Nature:Unknown
Departure airport:Mining site Moundsville
Destination airport:
Investigating agency: NTSB
Narrative:
HE HELICOPTER CONTACTED POWER LINES SHORTLY AFTER TAKEOFF FROM A MINE SITE. THE NOSE GEAR OF THE HELICOPTER CONTACTED AN UNINSULATED STATIC WIRE. THIS WIRE WAS STRUNG WITH ONE OTHER STATIC WIRE AND TWO BLACK INSULATED POWER LINES. BOTH CREW MEMBERS STATED THAT THEY SAW THE BLACK LINES AND BELIEVED THEIR RATE OF CLIMB WOULD ALLOW ADEQUATE CLEARANCE. AFTERHITTING THE FIRST SET OF LINES, THE HELICOPTER BEGAN A DESCENDING TURN AND THEN CONTACTED A SECOND SET OF POWER LINES ALONG WITH A POWER POLE. THE HELICOPTER THEN COLLIDED WITH A SWITCHING HOUSE AND CAME TO REST ALONGSIDE A EARTHEN SUPPLYSLOPE. NONE OF THE WIRES WERE MARKED. THE CAPTAIN STATED THAT HE DID NOT SEE THE SILVER COLORED STATIC WIRES.


The National Transportation Safety Board determines the probable cause(s) of this accident as follows:

VISUAL LOOKOUT..INADEQUATE..PILOT IN COMMAND
VISUAL LOOKOUT..INADEQUATE..COPILOT/SECOND PILOT

Contributing Factors:
OBJECT..WIRE,STATIC
PREFLIGHT PLANNING/PREPARATION..INADEQUATE..PILOT IN COMMAND
VISUAL/AURAL PERCEPTION..PILOT IN COMMAND

Sources:

https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20001213X25881&key=1&queryId=e1098e0d-1a88-4fc4-93d3-b540dca136fb&pgno=10&pgsize=200


Revision history:

Date/timeContributorUpdates
21-Jun-2010 06:25 TB Added
15-Aug-2015 13:54 Aerossurance Updated [Departure airport, Source, Damage, Narrative]
21-Dec-2016 19:25 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]

Corrections or additions? ... Edit this accident description

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