What was found
TPA - EN ROUTE CLT TO FLL, DURING CRUISE, A MASSIVE WATER LEAK WAS REPORTED IN THE AFT GALLEY. WATER TANK QUANTITY WENT FROM FULL TO LESS THAN ONE QUARTER TANK IN A SHORT TIME, FLOODING THE AFT GALLEY. ESTIMATE 15 GALLONS PLUS DRAINING ONTO FLOOR. FLIGHT DIVERTED TO TPA AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND THE O-RING DAMAGED ON LOWER AFT COFFEEMAKER. REPLACED O-RING. NO FURTHER LEAKS NOTED. COMPLIED WITH AFT LAV SPILL EVALUATION CARD PER J/C 03L11338001, AS DIRECTED BY MOC. SERVICED WATER TO FULL AND PRESSURE INSPECTED LINES, DRAINS AND FITTINGS UNDER BOTH LAVS, SINKS AND COFFEEMAKERS. NO LEAKS NOTED. AIRCRAFT OK FOR SERVICE.