The privately-registered Eurocopter EC-120B helicopter was on a local VFR flight from Toronto Billy Bishop/Toronto City Centre Airport, ON (CYTZ). The helicopter was being flown in circuits at Brampton Airport, ON (CNC3) when it experienced a loss of power. The helicopter crashed near the southern end of the airport property. Two (2) souls on board — no reported injuries. The helicopter was substantially damaged. Transportation Safety Board (TSB) advised.