As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A/C RTB DUE TO WATER COMING OUT OF AFT FLOOR DRAINS WHENEVER WATER IS POURED INTO AFT GALLEY DRAINS. ALSO HAD A PROBLEM WITH A WATER LEAK FROM A FWD GALLEY COFFEEMAKER. TURNED OFF WATER IN AFT GALLEY AND DEFERRED WATER PER MEL. PUT FWD COFFEEMAKER ON NEF. UNCLOGGED GALLEY DRAIN. FOUND CLOG IN Y-FITTING BY BULK CARGO AFT WALL. OK FOR SERVICE. MCO AND PLAC REMOVED.