As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE MANIFOLD PRESSURE DROPPED TO AMBIENT AND OIL PRESSURE DECREASED SHORTLY THERE AFTER. PILOT PERFORMED PRECAUTIONARY ENGINE SHUT DOWN. MAINTENANCE INSPECTED ENGINE AND FOUND BAD TURBOCHARGER AND REPLACED. MAINTENANCE PERFORMED PRECAUTIONARY OIL FILTER, AND PROPELLER GOVERNOR SCREEN INSPECTION, AND INSTALLED MEB-009 FOR POSSIBLE ICE BUILD UP IN OIL SCAVENGE LINES.