As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT, NR 2 ENG OIL PRESS BYPASS LIGHT ON. ALL OTHER IND NORMAL, DIVERTED TO MEM, LIGHT STAYED ON. NORTHWEST MTC CHECKED AND REPLACED OIL FILTER AND NO CONTAMINATION WAS FOUND. PUT THE NR 2 ENG BYPASS LIGHT ON MCO MEL 79-00-02. WHEN A/C ARRIVED ATL, MTC REPLACED DIFF PRESS SW 793701055 AND REMOVED MCO.