What was found
AT FL 330, 2.5 HRS INTO FLIGHT RIGHT AC BUS AND RIGHT BUS TIE ILLUMINATED, ALONG WITH NUMEROUS ASSOCIATED EICAS MESSAGES. AFTER RESETTING RIGHT GENERATOR, THE RIGHT AC BUS WAS RESTORED BUT THE ISLN LIGHT REMAINED ON. SHORTLY AFTER THAT THE FLIGHT ATTENDANTS REPORTED SPARKS COMING FROM AFT GALLERY CONTROL PANEL ON RIGHT SIDE. FLIGHT ATTENDANTS REMOVED POWER FROM GALLEY AND FLIGHT CREW REMOVED POWER FROM UTILITY BUSSES. REPLACED COFFEE MAKER.