What was found
THE "A" F/A REPORTED A CHEMICAL SMELL IN FIRST CLASS CABIN AND FWD COACH CABIN (ROW 5) WHILE AT 35,000' AND 1 HOUR OF CRUISE FLIGHT. NO ODOR NOTED IN COCKPIT. MX ACCOMPLISHED JC 26L00021001, "TROUBLESHOOT CABIN AIR QUALITY". APU OIL IS SERVICED CORRECTLY. RAN NR 1 AND NR 2 ENGINES, PLUS ACFT PACKS, IN ALL CONFIGURATIONS. NO CABIN ODORS NOTED AT ANY TIME. ACFT OK FOR SERVICE.