As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
METAL WAS FOUND IN OIL FILTER. CLEANED WENT FOR TEST FLIGHT, LOST OIL PRESSURE. ENGINE REMOVED, WITNESSED TEARDOWN. FOUND NR 2 MAIN BEARING SPUN AND DISINTEGRATED. CRANKSHAFT CHECKED OUT OK. ENGINE CASE WAS BADLY DAMAGED AT THE NR 2 BEARING BOSS ENGINE HAD 790 HOURS SFRM. ENGINE OPERATIONS WAS MOSTLY ON A FLOATPLANE. (K)