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ASN Wikibase Occurrence # 70867
Last updated: 23 October 2021
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Date:09-FEB-2000
Time:11:30 LT
Type:Silhouette image of generic S61R model; specific model in this crash may look slightly different
Sikorsky HH-3E (S-61R)
Owner/operator:Helipro
Registration: N650DC
MSN: 61-558
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Wairoa Gorge, 24 km SSW of Nelson -   New Zealand
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Nature:External load operation
Departure airport:
Destination airport:
Narrative:
The helicopter was slinging logs from an inaccessible forestry block to a nearby road head. On the thirteenth lift of the third cycle, the helicopter had just picked up a log and had just achieved translational lift, when a “bang” was felt through the airframe. The captain likened it to the jolt felt when a “choker” slips during a log lift. The helicopter developed a severe vertical oscillation, during which neither pilot was able to read the
instruments. The crew immediately jettisoned the log and commenced descent into the adjacent riverbed. During touchdown, the main rotor struck a small tree, causing the helicopter to roll on to its left side. Both pilots vacated the aircraft without injury, although both later discovered that they had sustained bruising from the front edge of their seats during the vertical oscillation. The cause of the oscillation was not discovered.

Sources:

NTSB
https://www.aviation.govt.nz/assets/publications/vector/Vector_2002_Issue-2_Mar-Apr.pdf


Revision history:

Date/timeContributorUpdates
31-Dec-2009 07:51 TB Added
01-Jan-2010 10:38 TB Updated [Aircraft type]
14-Jun-2010 13:12 TB Updated [Time, Location]
11-Oct-2021 18:59 harro Updated [Time, Source, Narrative]
11-Oct-2021 19:00 harro Updated [Nature]

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