What was found
FLT 1851 - GRR-MKE - AFTER TAKEOFF, THE CREW REPORTED THE LANDING GEAR WOULD NOT RETRACT AND THE INSTRANSIT LIGHTS REMAINED ILLUMINATED. THE CREW CONTINUED TO MKE WITH THE GEAR DOWN. MAINTENANCE INSPECTED THE SYSTEM AND FOUND A CORRODED JUMPER WIRE AT A325P1 IN THE NOSE WHEEL WELL. THE JUMPER WAS REPLACED AND THE GEAR OPERATIONALLY CHECKED GOOD. WITH NO FURTHER DISCREPANCIES NOTED THE A/C WAS RETURNED TO SERVICE. (M)