What was found
A/C RETURNED TO GATE DUE TO REPORTED ELECTRICAL ODOR IN CABIN. ODOR SMELL AT MID GALLEY AND 20 FEET AFT OF 3R DOOR. INSPECTED ALL MID GALLEY ELECT UNITS, NO DEFECTS. INSPECTED AREA BY 3R DOOR, ALL OK. ALL AFT GALLEY COMPONENTS RUN, PACK WITH ECON ON-OFF. CHECKED APU AIR SUPPLY, NO ODOR. AS PRECAUTION CHECKED ALL SEAT AND SIDE WALL BALLAST, NO PROBLEMS. AS PRECAUTION DEACTIVATED ENTERTAINMENT SYS.