As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS "SMELLY ODOR" ON AIRCRAFT. REMOVED FROM SERVICE. INITIALLY FOUND SLIGHT FISHY ODOR IN AFT CARGO PIT, NO LIQUIDS NOTED. PERFORMED FIM 21-20-00-810-801. ACS CHECKS GOOD, NO ODORS IN ALL COMBINATIONS/CONFIGURATIONS FOR ECS. ODOR NO LONGER PRESENT IN AFT CARGO PIT AFTER AIRING OUT FOR 30 MIN. NO DEFECTS NOTED AIRCRAFT IS OK FOR CONTINUED SERVICE. RETURNED TO SERVICE.