As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT, OIL FILTER BYPASS LIGHT ILLUMINATED AND STAYED ON. SHUT DOWN ENGINE. REPLACED NR 2 FILTER BYPASS SWITCH FOR ILLUMINATION DUE TO FILTER CONTAMINATION. IDLE CHECK OK. REPLACED NR 2 ENGINE OIL FILTER FOR CONTAMINATION IAW 79-61-00. IDLE CHECK OK. DRAINED AND SERVICED NR 2 ENGINE OIL IAW 79-11-01. IDLE CHECK OK.