As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - NOSE LANDING GEAR WOULD NOT RETRACT ON TAKEOFF OUT OF TULSA. LANDED DFW WITHOUT INCIDENT. NOSE LANDING GEAR INSPECTED WITH NO DEFECTS NOTED. SWUNG GEAR SEVERAL TIMES, COULD NOT DUPLICATE WRITE UP. SYSTEM GROUND CHECKED NORMAL OPERATION.