, a Piper Lance, was inbound to Saskatoon 16 NM northeast on a VFR flight from Tisdale when the pilot declared an emergency due to a rough engine. The a/c landed safely at 1432Z. The nature of the engine problem is not known. OPI - Maintenance and Manufacturing UPDATE TSB reported that the manifold pressure dropped to 18 inches but the oil pressure remained normal. Maintenance has not completed it's examination, but a malfunctioning turbocharger is suspected. UPDATE M. & M. reported that they contacted the owner of Piper Saratoga C-GBLY
and his story is : @ 4500 feet altitude inbound to YXE, the engine started running rough and manifold pressure dropped from 29" down to 18" and the oil pressure was in the green. The engine quit after the a/c turned off the active runway. The engine has 1600 hours time since last overhaul. Central Aircraft Maintenance in YXE is performing the repairs. They report that # 4 cylinder intake valve failed . Valve debris damaged the turbine side of the turbo-charger as well. Repairs are still in progress.