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ASN Wikibase Occurrence # 46409
Last updated: 16 January 2020
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Type:Silhouette image of generic UH1 model; specific model in this crash may look slightly different
Bell (Garlick) UH-1B
Owner/operator:B A and J C Emeny Limited (Helicopter Services)
Registration: ZK-HSF
C/n / msn: 62-2090
Fatalities:Fatalities: 1 / Occupants: 1
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Location:near Mokoreta, South Island -   New Zealand
Phase: En route
Departure airport:Waikawa Valley farm, NZ
Destination airport:Gore, NZ
Investigating agency: TAIC New Zealand
The Helicopter Services UH-1B helicopter ZK-HSF was on a ferry flight to Gore to facilitate maintenance work. En route near Mokoreta a main rotor blade separated, the helicopter broke up and fell to the ground. The pilot, the sole occupant, was killed and the helicopter was destroyed. The accident resulted from fatigue failure of a tension-torsion (TT) strap, a critical rotor hub component. The fatigue cracking had probably been initiated by an unreported rotor overspeed event.


Safety recommendations:

Safety recommendation 084/05 issued 21 November 2005 by TAIC to CAA NZ
Safety recommendation 085/05 issued 21 November 2005 by TAIC to CAA NZ
Safety recommendation 087/05 issued 6 September 2006 by TAIC to Federation Aviation Administration
Safety recommendation 088/05 issued 21 November 2005 by TAIC to Helicopter Services
Safety recommendation 089/05 issued 21 November 2005 by TAIC to Helicopter Services

Accident investigation:
Investigating agency: TAIC New Zealand
Status: Investigation completed
Download report: Final report

Revision history:

04-Nov-2008 10:35 ASN archive Added
29-Oct-2011 08:42 Dr. John Smith Updated [Cn, Operator, Location, Phase, Departure airport, Destination airport, Source]

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