What was found
REPORTED THAT FUEL WAS LEAKING FROM THE RE-FUELING PANEL. DETERMINED TO BE LEAKING DURING FUELING, LINE CRACKED AT WELD DIRECTLY OFF SPAR MANIFOLD, UPSTREAM OF RE-FUEL VALVE. MAINTENANCE REMOVED AND REPLACED THE RE-FUEL/DE-FUEL LINE AT THE REFUEL/DE-FUEL PANEL MANIFOLD IAW BOEING 737-300 MM 28-21-41, AWM 446 - 447 AND AWA TASK CARD R3M57001.