What was found
FLT 163 - MMMY-LRD - AFTER TAKEOFF, THE LANDING GEAR UNSAFE WARNING LIGHT ILLUMINATED WHEN THE HYDRAULIC SELECTOR WAS PUT IN BYPASS. REPRESSURIZED HYDRAULIC SYSTEM, LIGHT EXTINGUISHED. PROCEEDED TO LRD MADE NORMAL UNEVENTFUL LANDING AT LRD. THE AIRCRAFT WAS FERRIED FROM LRD TO DFW WITH THE LANDING GEAR EXTENDED. INVESTIGATION REVEALED THAT THE UPLOCK SPRINGS WERE HEAT DAMAGED. THE UPLOCK SPRINGS WERE REPLACED AND THE LANDING GEAR WAS OPERATIONALLY CHECKED IAW THE CONVAIR MM. (M)