As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE MASTER CAUTION ALERT FOR A CLOGGED OIL FILTER. ACCOMPLISHED TSM 79-30-00 AND FOUND THE SCAVENGE OIL FILTER CONTAMINATED. REMOVED AND REPLACED THE NR 1 ENGINE SCAVENGE OIL FILTER, RAN ENGINE, LEAK AND OPS CHECKED IAW MM 79-22-44.