Also occurred to a helo in Ireland, report here.
http://www.aaiu.ie/sites/default/fil...nts/4571-0.pdf
Preliminary indications are that the helicopter flew into the exhaust plume of the power station chimneys, and that the flame-out was due to the ingestion of the plume. The presence of a large volume of oxygen-depleted combustion by-products, the very high temperature of the emitted gases or the presence of large amount of water vapour in the emissions, or a combination of these factors was, in all probability, sufficient to cause the flame-out. It is noteworthy that one of the camera crew stated that there was no visible plume at the time.