As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED VIBRATION FROM LT ENGINE SHORTLY AFTER TAKEOFF. SECURED ENGINE, RETURNED TO AIRPORT. INITIAL INVESTIGATION FOUND ENGINE SEIZED/LOCKED UP. SUSPECT BROKEN CRANKSHAFT OR CONNECTING ROD. ENGINE RETURNED TO OVERHAUL FACILITY.