As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE GEAR HANDLE WOULD NOT MOVE PAST OFF POSITION AFTER TAKEOFF. THE AIRCRAFT WAS RETURNED TO ORD WHERE IT LANDED WITHOUT INCIDENT. TROUBLESHOOTING BY MAINTENANCE IAW MM 32-31-21, DUPLICATED CONTROL LEVER LOCK ON GROUND. THE LEVER LATCH CIRCUIT BREAKER WAS FOUND POPPED. THE CIRCUIT BREAKER WAS RESET. GEAR OPERATION WAS SIMULATED AND THE LEVER LOCK OPERATED NORMALLY WITH THE LEVER LATCH CIRCUIT BREAKER REMAINING IN.