As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT PAX AND FLT ATTEND NOTICED FAINT ODOR SIMILAR TO ELECTRICAL OR CHEMICAL FUMES. MOST CONCENTRATED AT MID CABIN ABOVE WING CNTR. ODOR DISSIPATED WITHIN 10-15 MINUTES. MAINTENANCE REMOVED AND REPLACED LT RECIRC FAN PER MM 21-25-00 AND BOTH FILTER ASSY'S PER MM 21-25. OPS NORMAL OK FOR SERVICE. SMELL DID NOT RETURN.