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Investigation of serious aviation incident at Maersk Invincible, Valhall oilfield

On 24 February 2020, a Sikorsky S-92A helicopter with nine passengers on board lost significant altitude shortly after departure from the jack-up oil installation Maersk Invincible. There was bad weather with night conditions, heavy rain, wind and reduced visibility when the aviation incident occurred. At low altitude, the pilots regained control and established a controlled and stable flight before heading towards the destination Stavanger Airport Sola.

Status of investigation

Collection of factual information has been completed, analysis and report writing is in progress

Latest update: 31.05.2021


Location Maersk Invincible (XMKI), Valhall oilfield, Norway
Occurrence date 24.02.2020
ICAO Location indicator XMKI
Aircraft Sikorsky øvrige
Operator Bristow Norway AS
Registration LN-ONT
Meteorological conditions VMC
County Annet/offshore
Type of occurrence Serious incident
Type of operation Offshore
Category of operation Heavy, helicopter (> 2 250kg)
Aircraft category Helicopter, Multi-engine, Turboprop/turboshaft


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