As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT ENGINE CRANKCASE CRACKED AT THE UPPER STUD AREA OF THE NR 6 CYLINDER ALLOWING THE CYLINDER TO COMPLETELY SEPARATE FROM THE CASE CAUSING ENGINE FAILURE UNDER NORMAL FLIGHT CONDITIONS. SUBMITTER RECOMMENDATION: DYE PENETRANT, INSPECTION CRANKCASE REF: AD 77-13-22, FOR EARLIER MODEL ENGINES.