As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FOWARD FAUCET WAS BUMPED OPEN ALLOWING WATER TO FLOW INTO THE SINK, OVERFILLING THE SINK, GOING INTO LOWER EQUIPMENT BAY. ALL THE CRITICIAL FLIGHT COMPONENTS ARE LOCATED THERE AND AFTER TAKEOFF THE CREW HAD TO RETURN BACK TO HOMEBASE DUE ALL THE FAILED SYSTEMS.