As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE LANDING GEAR WOULD NOT RETRACT AFTER TAKEOFF FROM EWR. THE GEAR HANDLE WOULD NOT RAISE BEYOND THE OFF POSITION. THE AIRCRAFT WAS RETURNED TO EWR WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE LANDING GEAR LATCH AND WARNING CIRCUIT BREAKER POPPED. THE CIRCUIT BREAKER WAS RESET. ALL THREE LANDING GEAR WERE SWUNG IAW MM 07-11-11 AND OPERATION CHECKED GOOD.