What was found
DURING OPERATIONAL CHECKS OF HYDRAULIC SYSTEM (AFTER REPLACEMENT OF FLAP CONTROL VALVE), NOTED A HYDRAULIC LEAK OUT OF AN ALUMINUM HYDRAULIC LINE, PN 260-7003-368, FOR THE FLAP EXTEND SYSTEM. THE LEAK WAS FROM A CORROSION PIN HOLE ABOAUT 1.50 INCHES FROM END OF LINE AND IN A 90 DEGREE BEND. THE LINE IS PAINTED WITH ZINC CHROMATE INCLUDING THE AREA WITH THE PIN HOLE. THE LINE APPEARS TO BE ORIGINAL. THIS LINE IS LOCATED ABOVE THE WING, AFT OF THE LEFT MAIN WHEELWELL.