As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: CABIN REPORTS STRONG BAD ODOR COMING FROM AIR VENTS IN FLIGHT LIKE DIRTY FEET. MAINTENANCE FOUND DRAIN MAST LINE LEAKING ON LEFT RECIRCULATION FILTER IN THE FWD CARGO COMPARTMENT. RELACED FWD DRAIN MAST FLEX LINE ABOVE RECIRCULATION FAN IAW AMM 38-31-00.