As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT RETURNED TO PLATFORM DUE TO AFTER ENGINES WERE STARTED, THE RT ENGINE "OIL FILTER BY PASS" LIGHT TURNED ON. MX PERSONNEL PERFORMED THE FIM 73-05, TASK 801CONFIRMING THE FAILURE; SO RT ENGINE FILTER AND ALARM WERE REPLACED THE IAW MM 73-11-02 AND MM 73-34-01, ALL CORRECT.