As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DISTRIBUTION GEAR BROKE AND CONTACT STUCK ON NR 2 CYL LEAD. MAG CONTINUED TO ROTATE CAUSING ONLY NR 2 CYL TO FIRE EACH TIME POINTS OPENED. THIS CAUSED SEVERE DETONATION IN NR 2 CYL BURNING A HOLE THROUGH PISTON. THIS RESULTED IN AN INFLIGHT SHUT DOWN. ENGINE INSP, AND FOUND TO BE CONTAMINATED WITH METAL. ENGINE REPLACED. SUBMITTER STATED IMPROPER MAINT AND OVERHAUL TIME OF MAG NOT C/W.