As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE POST FLIGHT INSPECTION, THE NR 1 ENGINE OIL FILTER BYPASS INDICATOR WAS NOTED IN THE BYPASS POSITION. A SOAP WAS TAKEN AND RESULTS WERE NORMAL. THE BYPASS INDICATOR, PN 3070246-4 ON THE ENGINE WAS SUSPECT TO BE DEFECTIVE AND WAS REPLACED IAW SB TFE731-79-3069. COMPLIED WITH GROUND RUN LEAK CHECKS, NO DEFECTS NOTED.