What was found
AFTER PUSHBACK THE FA REPORTED TO THE CREW A BURNING SMELL IN THE GALLEY AREA. THE CREW RETURNED THE AIRCRAFT TO THE GATE FOR MAINTENANCE. GALLEY FAN IS SUSPECT AND THE AIRCRAFT IS CURRENTLY WAITING ON A MAINTENANCE INSPECTION. NO EMERGENCY. INSP GALLEY ,CABIN, AVIONICS AREA & FANS, AFT EQ BAY PACKS & APU NO SMELL OR DEFECTS NOTED. TAXI ACFT TO DUPLICATE EVENT STILL NO DEFECTS NOTED. FURTHER INSP FOUND AFT DRAIN MAST HEATER RED IND ON CONT. PNL. MX & CREW CK MDU FOUND DRAIN FAULT MSG WAS RECORDED ON TXI AT THE SAME TIME SMELL WAS REPORTED. MELED AFT DRAIN MAST HEATER. NO OTHER DEFECTS NOTED"