As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER TAKEOFF ENGINE MANIFOLD PRESS DROPPED TO 23 INCHES, THE PILOT TURNED AND LANDED BACK AT AIRPORT. MANTENANCE FOUND THE TURBO BEARINGS FAILED. ENGINE WAS FLUSHED AND NEW FILTER AND OIL INSTALLED WITH THE TURBO BEING REPLACED. A/C WAS GROUND RUN AND TEST FLOWN FILTER WAS CHECKED FOR METAL AND INSIGNIFICANT AMOUNTS WERE FOUND. ANOTHER FILTER WAS INSTALLED AND A/C RETURNED TO SERVICE.