What was found
FLIGHT 2015 SENT AN ACARS MSG TO DISPATCH ADVISING THAT THERE WAS A SMELL OF FUMES IN THE COCKPIT AREA DURING CLIMB OUT. THEY ALSO ADVISED THAT THE A FLIGHT ATTENDANT SMELLED THE SAME ODOR AS WELL. IT WAS THEN DETERMINED THAT THE BEST ACTION WOULD BE TO RETURN & HAVE MX MEET THE ACFT. THE FLIGHT RETURNED & LANDED WITHOUT INCIDENT. THE FLIGHT WILL BE SWAPPED TO ANOTHER ACFT & OPERATE DELAYED. ACCOMPLISHED THE CABIN AIR QUALITY TROUBLESHOOTING TASK CARD 26L0021001, CLEARED THE AVIONICS CHECK VLV IAW AMM 21-26-56-40-001-A & REPLACED THE DEMISTER FILTER IAW AM 21-26-43-400-003-A. SEE USAA2015033100010.