What was found
APPROX 1 HR INTO FLIGHT, THE FLIGHT ATTENDANTS IN THE AFT GALLEY COMPLAINED OF AN ODOR, MAYBE OF A CHEMICAL NATURE COMING FROM AFT GALLEY AND ABOUT 4 ROWS OF SEATS FWD OF GALLEY. ODOR WAS OFF AND ON FOR REMAINDER OF FLIGHT. TURNED ON ALL LIGHTS, OVENS AND COFFEEMAKERS THRU-OUT A/C RAN BOTH PACKS WITH APU, NO FAULTS OR ODORS NOTED. RAN BOTH ENGS AND ISOLATED BOTH AIR SOURCES TO RUN PACKS. NO CHEMICAL OR ANY OTHER UNUSUAL ODORS NOTED. ALL CHECKS NORMAL.