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ASN Wikibase Occurrence # 231559
Last updated: 1 February 2020
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Date:26-FEB-2019
Time:16:31 UTC
Type:Silhouette image of generic EC35 model; specific model in this crash may look slightly different
Eurocopter EC135T1
Owner/operator:Royal Cayman Islands Police Service (RCIPS)
Registration: VP-CPS
C/n / msn: 0107
Fatalities:Fatalities: 0 / Occupants: 6
Other fatalities:0
Aircraft damage: Substantial
Category:Accident
Location:Grand Cayman Island-Owen Roberts International Airport (GCM/MWCR) -   Cayman Islands
Phase: Take off
Nature:Training
Departure airport:Grand Cayman Island-Owen Roberts International Airport (GCM/MWCR)
Destination airport:Grand Cayman Island-Owen Roberts International Airport (GCM/MWCR)
Investigating agency: AAIB
Narrative:
At the start of a ‘training and search’ detail in the Cayman Islands, the pilot lifted the helicopter to a height of approximately four feet and felt the cyclic control stick shake and exert a rearwards force. He immediately lowered the collective lever and the helicopter landed heavily, sustaining damage to the tail boom, landing gear and transmission deck.
A subsequent inspection of the helicopter revealed the longitudinal axis of the main rotor actuator had failed. A tie bar within the actuator had suffered pitting corrosion, leading to intercrystalline corrosion and cracking which resulted in overload failure of the remaining material. It is possible that moisture penetrated into the actuator and allowed the tie bar to corrode. The environment conditions of the Cayman Islands may have contributed to the corrosion. Safety actions have been taken to ensure the continued airworthiness of the worldwide fleet and to review the design of the actuator to prevent moisture ingress.

Sources:

http://aerossurance.com/helicopters/ec135-flying-control-failure/
https://www.gov.uk/aaib-reports/aaib-investigation-to-ec135t1-vp-cps

Accident investigation:
cover
  
Investigating agency: AAIB
Status: Investigation completed
Duration: 9 months
Download report: Final report


Revision history:

Date/timeContributorUpdates
19-Dec-2019 18:06 harro Added
19-Dec-2019 18:07 harro Updated [Total occupants, Location, Nature, Destination airport]
01-Feb-2020 01:21 Aerossurance Updated [Source]
01-Feb-2020 02:11 Aerossurance Updated [Embed code]

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