As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMELL OF MUSTY SOCKS THROUGHOUT AIRCRAFT DURING FLIGHT. C/A-T/S IAW FIM TASK 21-20-00 AND FOUND LT RECIRCULATION SYSTEM MUFFLER SCREEN TO BE DIRTY. CLEANED LT RECIRCULATION SYSTEM MUFFLERS IAW AMM 21-42-02. PERFORMED OPC OF LT AND RT PACKS IAW AMM 36-00-00 AND COULD NOT DUPLICATED SMELL. NO FURTHER ODORS AT THIS TIME. PERFORMED ENG ODOR EVENT T/S SUPPLEMENT IAW ETN-EM-72-034.