As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED ACRID ODOR IN THE CABIN AND COCKPIT. PILOTS FOLLOWED QRH AND ODOR WENT AWAY THEN ODOR RETURNED. FLIGHT DIVERTED AS A PRECAUTION. MX REMOVED LT AND RT RECIRCULATION FAN FILTERS. FOUND PIECES OF FILTER IN DUCT ON BOTH SIDES. CLEANED DEBRIS AND REPLACED FILTERS. ALSO FOUND MID GALLEY OVEN EMITTING PLASTIC ODOR. REPLACED OVEN.