As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
POTABLE WATER DRAIN WILL NOT CLOSE REF DF0790. REPLACED FWD WATER DUMP VALVE ACTUATOR. DURING OPS CHECK VALVE FAILED TO CLOSE AND WATER SYSTEM DRAIN CIRCUIT BREAKER LOCATED IN AFT GALLEY CEILING POPS REPEATEDLY. FOUND NEW VALVE SHORTED INSIDE, REPLACED FWD VALVE ASSY. OP CHECKED NORMAL.