What was found
(CAN) THE AIRCRAFT POTABLE WATER SYSTEM WAS DAMAGED DUE TO HAVING THE WATER SYSTEM FULL OF WATER. THEN HAVING THE AIRCRAFT LEFT ON THE RAMP FOR 8 HOURS AT -14C WITH NO ADDITIONAL HEAT TO KEEP THE WATER SYSTEM FROM FREEZING. UPON ARRIVAL THE PILOTS REPORTED (WATER APPEARS TO BE LEAKING FROM THE BELLY). THE MAINTENANCE PERSONNEL INVESIGATED THE SNAG AND FOUND THE WATER SYSTEM DRAIN VALVE WAS DAMAGED DUE TO THE SEVERE FREEZING. A REMINDER TO ALL CORPORATE PILOTS TO MONITOR THE POTABLE WATER SYSTEM AND THE OAT IN WINTER. (TC NR 20070327002)