What was found
WHEN THE OIL FILTER WAS REMOVED DURING AN ENGINE INSPECTION, DISCOVERED A PLUG THAT WAS PRESSED INTO AN UNUSED OIL PASSAGE IN THE OIL FILTER ADAPTER HAD COME LOOSE. THIS ALLOWED THE OIL FILTER TO BE BYPASSED AND FOR UNFILTERED OIL TO BE PUMPED IN THE OIL SYSTEM. THIS WAS A FACTORY REBUILT ENGINE WITH 239 HRS SINCE INSTALL. IT IS RECOMMENDED THE OIL FILTER ADAPTERS THAT HAVE THIS FEATURE BE INSPECTED TO CONFIRM THE SECURITY OF THE BLOCK-OFF PLUG INSTALLATION.