What was found
AIRCRAFT PERFORMED AN UNSCHEDULED LANDING AT MID DUE TO DURING CRUISE THERE WAS NO POTABLE WATER IN GALLEY OR LAVATORIES & THE INSTRUMENT INDICATED 3 /4 FULL. DURING MX REVISION, THE WATER TANK ACCESS DOOR PANEL NR 146ARY WAS DETECTED OPENED. SO THE PANEL WAS CLOSED IAW AMM 12-14-01, THE POTABLE WATER SYS CHECK WAS PERFORMED IAW AMM 38-11-00, ALL CORRECT. MX PERSONNEL PERFORMED OVERWEIGHT LANDING CONDITIONAL INSPECTION IAW MM 05-51-35, NO DAMAGES WERE FOUND.