What was found
ELECTRICAL SMELL COMING FROM MID CABIN JUST AFT OF MID GALLEY. FUMES ONLY DEPOWERED UTILITY BUSSES AND AIRSHOW PASSENGER NOTED CRACKLING IN HEADSET ALONG WITH FUMES ROW 10. DROPPED CEILING PANEL AND CHECKED AREA, FREEZER, OVEN AND CHILLER OPERATING, UNABLE TO DETECT ANY FUMES. REF CMI C/N 101490364 AND 101290324 FOR POSSIBLE CAUSE.