As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OIL SAMPLE SHOWS AMS6270 STEEL FROM CAMSHAFT, EMS-91 CAST IRON FROM TAPPETS AND ALUMINUM ALLOY WORN 5 PERCENT TIN CONTENT FROM BEARING INSERTS. OIL TIME SINCE LAST CHANGE, 20.2 HOURS. RECENT CHANGE OUT OF OIL SUMP AND TURBO SUPPORT BRACKET RIGHT SIDE. SUBMITTER STATED SIMILAR PROBLEMS ON OTHER TIO-520-AE2A.