What was found
LT MAIN GEAR WOULD NOT RETRACT AFTER T/O STAYED DOWN AND LOCKED PLUS RED UNLOCK WAS ON, (DECLARED EMERGENCY) PLACED ON MEL 32-03 AUTH NR110015DMC. CLEANED CORRODED CONNECTOR AT LT MLG WOW PROX SWITCHES 50GB & 51GB, RESECURED WIRE BUNDLE TO SELECTOR VALVE 13GA, REF 72AWM SP 29-27-17. PERFORMED LANDING GEAR EXTENSION & RETRACTION IAW JIC 323100-FUT-10000. FUT GOOD, MEL 32-03 RESTORED.