What was found
(CAN) DURING CRUISE, FLT ATTENDANT EXPERIENCE ELECTRIC ACRID SMELL COMING FROM THE AFT GALLEY. FURTHER INVESTIGATION REVEALED THAT SMOKE WAS COMING FROM NR 4 OVEN. THE FLIGHT CREW WAS ADVISE, THE BREAKERS WERE PULLED AND THE GALLEY POWER WAS INTERRUPTED. THE ACFT RETURNED SAFELY TO AIRPORT. UPON ARRIVAL INVESTIGATION BY MAINTENANCE REVEALED THE NR 4 OVEN UNIT WAS AT FAULT. THE OVEN IS BEING RETURNED TO THE REPAIR FACILITY FOR FURTHER INVESTIGATION.