As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) OIL COOLER HAD ONLY BEEN INSTALLED THE MONTH BEFORE AND FAILED IN THE SAME AREA AS THE PREVIOUS COOLER LEADING TO AN INFLIGHT SHUTDOWN OF THE ENGINE. THE PROPELLERS WERE BALANCED, ENGINE ATTACH STRUCTURE INSPECTED, OIL COOLER MOUNTING INSPECTED ETC. BUT NOTHING DEFINITIVE WAS NOTED AND THE ACFT MFG CONCURRED THAT WE HAD LOOKED AT ALL THEY COULD THINK OF LOOKING AT. THE O/H FACILITY OF THE COOLERS HAS BEEN CONTACTED CONCERNING THE FAILURES.