As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, THE NR 1 ENGINE OIL STRAINER CLOGGING LIGHT ILLUMINATED. ALL ENGINE PARAMETERS REMAINED NORMAL. EMERGENCY DECLARED. LANDING UNEVENTFUL. AIRCRAFT GROUNDED. MAINTENANCE ACCOMPLISHED MCM CARD 71-91-14 AND 71-91-11. REMOVED AND REPLACED NR 1 ENGINE OIL FILTER IAW AMM 79-20-06. OPS AND LEAK CHECKED NORMAL. DEBRIS IN FILTER DETERMINED TO BE CARBON..