Aviation news release 2012

The TSB releases report into the May 2011 engine power loss of a Eurocopter helicopter in Butler Lake, Ontario

Gatineau, Quebec, 2 August 2012 – The Transportation Safety Board of Canada (TSB) today released its investigation report (A11C0079) into the 27 May 2011 engine power loss and forced landing of a Eurocopter AS-350 helicopter, operated by Expedition Helicopters Inc., in Butler Lake, Ontario.

The helicopter left Butler Lake, Ontario, with a pilot and four passengers on board. Shortly after leveling off, the pilot felt two yaw kicks in the control pedals and heard a warning horn. These were followed by a total loss of engine power and a low speed warning horn. A malfunction in the engine caused it to overspeed. This activated the engine's overspeed protection system and its cycles, combined with increased fuel pressure related to its inducer jet, likely caused the engine to flame out and lose power. The aircraft landed hard in shallow waters. The occupants had injuries and damage to the aircraft was substantial.


The TSB is an independent agency that investigates marine, pipeline, railway and aviation transportation occurrences. Its sole aim is the advancement of transportation safety. It is not the function of the Board to assign fault or determine civil or criminal liability.

For more information, contact:
Transportation Safety Board of Canada
Media Relations
Telephone: 819-994-8053
Email: media@tsb.gc.ca