As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WE CONTINUE TO HAVE ISSUES WITH THIS TYPE OF OIL COOLER ON CONTENTIAL IO-550-N ENGINES. THE COOLERS ARE CRACKING ON THE BAFFLE FLANGE AND MORE CRITICALLY ON THE MOUNTING FLANGE. NO OIL LEAK HAD DEVELOPED YET, BUT THE MOUNTING FLANGE CRACK WAS NEAR A MAIN OIL PORT AND HAD THE POTENTIAL TO LEAK OIL, HAD THE CRACK DEVELOPED FURTHER. (TC# 20151217013)