C-GINH, a C-172 operated by Victoria Flying Club, was on a sight-seeing flight south of Victoria International Airport (CYYJ) when smoke was noticed coming from the instrument panel. Shortly after, the engine (Lycoming O-360-A3A) began to run rough and the windscreen became covered in oil. The pilot declared a Mayday and began a return to CYYJ but the engine lost all power and a forced landing was conducted in a field about 9 nm south of CYYJ. The aircraft overturned on landing and was substantially damaged. The pilot and passenger received minor injuries.
Company maintenance found the crankshaft had broken several inches aft of the propeller flange and the propeller departed the aircraft in flight.