What was found
(CAN) A/C ARRIVED ON A TURN AROUND AT YYZ. CREW INFORMED MTCE THAT THEY SMELLED SOMETHING BURNING IN THE AFT GALLEY. MTCE ISOLATED THE ODOR TO THE AFT LT GALLEY UNIT, NR 1 & 2 COFFEEMAKERS. THE COFFEEMAKERS WERE REMOVED FOR INSPECTION. MTCE FOUND THAT THE SHELF COMPARTMENT FLOOR ON WHICH THE COFFEEMAKERS SAT, SHOWED EVIDENCE OF OVERHEATING. THIS IS MOST LIKELY DUE TO THE PROXIMITY OF THE COFFEEMAKER BOILER PLATE TO THE COMPARTMENT FLOOR. AT ALL COFFEEMAKER LOCATIONS IN THE GALLEY, A DOUBLER WAS INSTALLED ON THE HONEYCOMB PANEL IAW CFT CMM 25-31-95.