What was found
REAR GALLEY F.A REPORTS LOUD THUMPING NOISE IN THE FLOOR AND IT CAN ALSO BE FELT AT GALLEY. OPENED AFT WALL OF AFT CARGO PIT TO INSPECT FOR LOOSE DUCTS OR DAMAGE TO COMPONENTS RELATED TO WATER SYSTEM. WATER SVC EMPLOYEE CONFIRMED THAT WATER TANK WAS FULL EVEN THOUGH CREW SAID NO WATER PRESSURE WAS AVAILABLE. CYCLED WATER COMPRESSOR CB. AND COMPRESSOR OPERATED AND SHUT DOWN AFTER SYSTEM PRESSURIZED. OPERATED NORMALLY. WATER SYSTEM AND ALL ASSOCIATED SPIGOTS AND FLUSH VALVES