As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: MUSTY/DIRTY SOCKS ODOR IN CABIN AND FLIGHT DECK DURING CLIMB CRUISE WITH FANS ON. ODOR MILD WITH FANS OFF. NO REPORTS EYES/ THROAT/ IRRITATION. MAINTENANCE REPLACED RECIRCULATION FILTER CARTRIDGE PER AMM 21-21-41.