What was found
AIR RETURN TO ESC FOR GEAR HANDLE INTRANSIT LIGHT REMAINED ILLUMINATED AFTER GEAR RETRACTION. MAINTENANCE INSPECTED AIRCRAFT AND FOUND ICE ON UPLOCK LATCHES. APPLIED HEAT TO LANDING GEAR, INSPECTED AIRCRAFT AND FOUND SAFE FOR A ONE TIME FERRY FLIGHT FROM ESC TO DTW WITH LANDING GEAR DOWN AND NOT PINNED. MAINTENANCE INSPECTED LANDING GEAR, CLEANED LANDING GEAR UPLOCK SWITCHES, PERFORMED SEVERAL LANDING GEAR OPS CHECK. ALL GOOD AT THIS TIME PER SAAB 340 MM CHAP 32.