As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SUDDEN ENGINE ROUGHNESS, PARTIAL POWER WENT FULL RICH ON 1 MILE FINAL. ADDED POWER TO FLARE, ENGINE FAILED ENTIRELY DUE TO FLOODING. ROCKER ARM FOUND BROKEN. APPEARS TO BE A FORGE CASTING FLAW THAT INITIATED FATIGUE FAILURE AND/OR HYDROGEN EMBRITTLEMENT. BROKEN ROCKER ARM REMOVED, AND SENT TO MFG FOR ANALYSIS.