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ASN Wikibase Occurrence # 168789
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Time:11:14 LT
Type:Silhouette image of generic AS55 model; specific model in this crash may look slightly different
Aérospatiale AS 355F1 Ecureuil II
Registration: ZK-IAV
MSN: 5041
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Minor
Location:Mt Victoria, Wellington 1 -   New Zealand
Phase: Initial climb
Departure airport:Wellington International
Destination airport:Marlborough Sounds
Investigating agency: TAIC New Zealand
Confidence Rating: Accident investigation report completed and information captured
Two minutes after departure, one of the 3 main rotor blade spherical thrust bearings attached to the rotor head failed. The failure caused a significant loss of rotor balance and track, resulting in severe vibration. Despite the vibration and limited control, the pilot completed a successful emergency landing in a nearby sports field with no injuries.

The bearing failed because of internal corrosion and de-bonding of its elastomer segment, which was probably a result of some undetected surface damage to the elastomer surface.


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

Safety recommendation 021/08 issued 20 June 2008 by TAIC to CAA NZ
Safety recommendation 022/08 issued 20 June 2008 by TAIC to CAA NZ

Revision history:

16-Aug-2014 15:32 Aerossurance Added
23-May-2016 19:18 Aerossurance Updated [Aircraft type]
11-Oct-2021 15:57 harro Updated [Time, Cn, Operator, Source]
02-Feb-2022 02:32 Ron Averes Updated [Location]
13-Feb-2022 01:32 Ron Averes Updated [Location]

Corrections or additions? ... Edit this accident description

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