What was found
CLE - FLT 3080 - CREW REPORTED AFTER TAKEOFF AND DURING CLIMB, THE FLAPS WOULD NOT RETRACT. AIRCRAFT RETURNED TO FIELD. MAINTENANCE INSPECTED AIRCRAFT AND REMOVED AND REPLACED THE LEFT HAND FLAP SAFETY SWITCH IAW B1900D MM 27-50-00, ALL OPERATIONAL CHECKS WERE GOOD. AIRCRAFT RELEASED FOR SERVICE. ACFT TT, 3,426.8 HOURS. ACFT TOTAL CYCLES, 4,135. (X)