As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STL - FLT 556 - AFTER TAKEOFF, LANDING GEAR LEVER WAS LOCKED. USED OVERRIDE PROCEDURES TO RETRACT LANDING GEAR. FOUND WORN BOLT FOR LANDING GEAR SAFETY SWITCH SENSOR ACTUATOR. REPLACED BOLT AND LANDING GEAR, OPERATION CHECKED NORMAL. CHECK C - 8-8-95 - MCI.