As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT DIVERTED DUE TO VIBRATION IN THE AFT GALLEY FLOOR. CREW REPORTS NO WATER PRESS IN ALL GALLEY AND LAVS. ALSO REPORT VIBRATION IN AFT GALLEY FLOOR AREA , CHECKED EXTERIOR SERVICE PANEL DOOR FOR SECURITY AND VERIFIED THAT SERVICE HANDLE WAS FULLY CLOSED AND NO AIR WAS DUMPING OVERBOARD. FOUND WATER FILL VALVE HANDLE IN THE OPEN POSITION WITH DOOR CLOSED. RE-SERVICED PER UA ENGINEERING SPECIFICATIONS.