ASN Wikibase Occurrence # 145760
Last updated: 2 September 2014
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Date:21-MAY-2012
Time:12:33 LT
Type:Silhouette image of generic H500 model; specific model in this crash may look slightly different
Hughes 369D 500D
Owner/operator:Way to Go Heliservices Ltd.
Registration: ZK-HXZ
C/n / msn: 1170233D
Fatalities:Fatalities: 1 / Occupants: 1
Other fatalities:0
Airplane damage: Written off (damaged beyond repair)
Location:Lake Sumner, North Canterbury -   New Zealand
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Nature:Agricultural
Departure airport:
Destination airport:
Narrative:
The helicopter crashed into an isolated lake in north Canterbury on Monday 21 May 2012.

The helicopter was one of two Rangiora-based Hughes 500s spraying gorse for the Department of Conservation. When one failed to return just before 3pm, the pilot of the other helicopter returned to the scene and spotted wreckage in the lake. The helicopter, with Rangiora pilot Michael Graeme Mehrtens aboard, is thought to be at the bottom of Lake Sumner (12m deep), about 140km northwest of Christchurch. The area is part of the Lake Sumner Conservation Park.

NZ CAA concluded CFIT occurred at some speed.

The investigation found that it was most likely that the pilot experienced some form of spatial disorientation with elements of somatogravic illusion and height perception illusion. This resulted in inadvertently flying a shallow descending flight path.

Sources:
http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=10807361
http://www.radionz.co.nz/news/regional/106342/helicopter-crashes-into-north-canterbury-lake
http://www.caa.govt.nz/Accidents_and_Incidents/Accident_Reports/ZK-HXZ_Fatal.pdf



Rangiora 6Jan2011

Revision history:

Date/timeContributorUpdates
21-May-2012 00:58 gerard57 Added
21-May-2012 04:11 122.57.122.50 Updated [Aircraft type, Source, Narrative]
22-May-2012 02:33 flyernzl Updated [Aircraft type, Registration, Cn, Operator]
23-May-2012 08:43 gerard57 Updated [Damage, Narrative]
16-Aug-2014 11:47 Aerossurance Updated [Time, Location, Source, Narrative]
Number of views: 2115

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