was on a VFR flight from Salmon Arm, BC to Edson, AB with only the pilot on board, when the a/c had a complete engine failure over Highway 16 near the town of Jasper. The pilot was able to carry out a successful forced landing on the highway near the intersection of 16 and Highway 93 at the west end of the townsite. The a/c was not damaged and the pilot was not injured. An aviation maintenance engineer came to the site and examined the engine, and the initial assessment is that there may be a major mechanical malfunction, such as a crankshaft or piston failure. The a/c was towed to the Jasper airport with the assistance of the local RCMP,
and the engine will be examined further there. It was reported that the engine was installed in 1996. (The RCMP
also reported that the pilot was able to stop the a/c at the red light which controls the highway intersection.) UPDATE A maintenance examination of the engine discovered that there was a sheared dowel on the crankshaft accessory drive gear assembly. UPDATE The engine manufacturer has listed more than 40 cases of similar failures, with 33 of these occurring in flight, resulting in complete loss of power. Since 1991, there has been an Airworthiness Directive, a Service Bulletin, and a Service Letter issued for modifications that would prevent this problem, but they are only required at overhaul, a propellor strike or when the gear train is repaired. The engine in this a/c had 973 hours since overhaul in 1975, and had not had the modification done.