As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG DIRTY SOCK ODOR IN COCKPIT. PERFORMED CAUSE OF ODOR TROUBLESHOOTING IAW TSM 05-50-00 AND DECONTAMINATION OF ECS 1 IAW AMM 21-00-00-615-001 NO CONTAMINATION FOUND. ENGINE RUN 1 AND 2 IAW AMM 71-00-00. REMOVED AND REPLACED THE RECIRC FILTERS IAW AMM 21-21-41.