As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JFK INFLIGHT T1781/03SEP DURING CLIMB CREW RECEIVED NUMBER ONE ENGINE OIL CLOG INDICATION FOLLOWED BY NUMBER TWO ENGINE OIL CLOG INDICATION. RETURNED TO JFK AND LANDED WITHOUT INCIDENT. REPLACED NUMBER ONE AND NUMBER TWO ENGINE OIL SCAVENGE FILTER DIFFERENTIAL PRESSURE SWITCHES. SYSTEM GROUND CHECKED NORMAL OPERATION.