What was found
FLT 2033, BOS-IAH. CB FOR AFT GALLEY HTR 3 AND AFT GALLEY HTR 2 TRIPED IN FLIGHT AT 2020 UTC AFT CREW MEMBER REPORTED ELECTRICAL BURNING SMELL/ODOR DISSIPATED AFTER 3-4 MINUTES ( GALLEY FAN (GFAN) AFT GALLEY ); PERFORMED UNUSUAL OF SMOKE OR FUMES OCCURRENCE FIP J21-22-00 CB'S AFT GALLEY HTR 2 + HTR 3 WERE FOUND POP OUT IN EICAS. THIS WAS THE SOURCE OF ELECTICAL SMELL. AFT GALLEY FAN + AFT GALLEY HEATERS WERE DEACTIVATED, LOCKED OUT AND PLACED ON MEL 21-23-64 B CAT C MX4 UPDATED PLACARD INSTALLED MCC ENRIQUE NOTIFIED (SUPPLEMENTAL INFORMATION TO FOLLOW)