An electrical problem caused a Quebecor news helicopter to lose power and crash near a Montreal movie studio in December 2009, the Transportation Safety Board of Canada has found. TSB investigators said the circuit breaker that feeds the clutch system was activated during the flight, interrupting the power supply.  See also HeliHub.com page for this accident – 16-Dec-09 C-GDSF Robinson R44 Montreal, Quebec, Canada [File photo]