As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OIL FILTER BYPASS MESSAGE SHOWS ON THE ENGINE DISPLAY ENG 1 LIGHT EXTINGUISHED WHEN THRUST LEVER RETARDED REF TASK 79-05 TASK 817 REMOVED AND REPLACED SCAVENGE OIL FILTER :1 29-7912-3-0001,QTY :1 99-7921-3-0008,QTY :1 AND CLOGGING TRANSMITTER AND INSPECTED CHIPS DETECTORS RAN ENGINE NO LEAKS.