What was found
CAPTAIN REPORTED THAT LT HYDRAULIC QUANTITY DROPPED TO 2 QUARTERS DURING DESCENT. DURING MAINTENANCE CHECK, A HYDRAULIC LEAK WAS DETECTED IN THE LT REVERSE CONTROL VALVE DUE TO A LINE THAT WAS LOOSE. HYDRAULIC LINE WAS REFASTENED IAW MM 78-31-04, TESTED CORRECT. DURING OVERNIGHT CHECK, A LEAK TEST WAS PERFORMED IAW MM 78-31-04, ALL CORRECT.