http://avherald.com/h?article=43f57ac7
An Air Canada Jazz Canadair CRJ-100, registration C-FWJT performing flight QK-7678 from Montreal,QC (Canada) to Boston,MA (USA) with 17 people on board, was in the initial climb out of Montreal when the crew heard a loud bang from engine #2 (CF34, right hand), felt strong vibrations, and the engine's Inter-Turbine Temperature went above limits. The crew levelled off at 6000 feet, shut the engine down, declared emergency and returned to Montreal for a safe landing about 35 minutes after departure.
A replacement CRJ-100 reached Boston with a delay of 2.5 hours.
The Canadian TSB reported that a borescopic inspection showed major damage at the stage 5 of compressor with parts of some blades missing. The engine is going to be replaced.