As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT RIGHT OIL FILTER MSG APPEARED, ACFT RETURNED TO GATE (BTB) AND MTX GROUNDED ACFT. REMOVED AND REPLACED THE RT ENG OIL FILTER DIFFERENTIAL PRESSURE SWITCH AND SCAV ENGINE OIL FILTER IAW AMM 79-35-01, & 79-21-04. OPS CHECKED GOOD. ACFT RELEASED ETOPS 180. LEAK CHECK GOOD. MX RETURNED ACFT TO SERVICE.