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ASN Wikibase Occurrence # 44727
Last updated: 3 December 2021
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Date:26-AUG-2004
Time:07:01
Type:Silhouette image of generic S64 model; specific model in this crash may look slightly different
Sikorsky S-64E (CH-54A)
Owner/operator:Erickson Air-Crane, opf. Hélipaca
Registration: N248AC
MSN: 64-066
Fatalities:Fatalities: 2 / Occupants: 2
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Vix, Ventiseri, Corsica -   France
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Nature:Fire fighting
Departure airport:Bastia, Corsica
Destination airport:Bastia, Corsica
Investigating agency: BEA
Narrative:
A Sikorsky S-64 Skycrane, N248AC, crashed on a fire-fighting mission near Bastia, Corsica. An in-flight break-up occurred after a water-spreading mission. The aircraft impacted terrain and was destroyed. Both persons on board were fatally injured.
The ex CH-54A Tarhe/68-18461/US Army, named "Helitanker 735", had been leased to French operator Hélipaca and was being operated on behalf of the French Ministry of Interior.

Causes of the accident:
The accident was most likely caused by the in-flight failure of the black blade pitch control rod, which did not have the same mechanical characteristics as the others. The failure occurred in very few cycles, likely as a result of the high loads and stresses in turbulent air encountered during flight in mountainous areas.
After the connecting rod failed, the black blade interfered several times with the tail boom structure, resulting in the inevitable loss of control of the helicopter.

Sources:

1. http://www3.ntsb.gov/aviationquery/brief.aspx?ev_id=20041028X01713&key=1

Accident investigation:
cover
  
Investigating agency: BEA
Status: Investigation completed
Duration: 15 years and 6 months
Download report: Final report


Revision history:

Date/timeContributorUpdates
28-Oct-2008 00:45 ASN archive Added
25-Dec-2009 10:18 TB Updated [Aircraft type, Cn, Operator, Other fatalities, Location, Country, Phase, Nature, Narrative]
19-Jun-2010 00:54 TB Updated [Time, Operator, Source, Narrative]
19-Mar-2011 09:54 TB Updated [Time, Operator, Source, Narrative]
19-Mar-2011 09:56 TB Updated [Narrative]
21-Dec-2016 19:24 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
06-Mar-2020 11:47 harro Updated [Narrative, Accident report, ]

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