As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, THE NOSE GEAR WOULD NOT RETRACT. RAN QRH AND RETURNED TO DEPARTURE. REMOVED AND REPLACED THE NLG WOW NR 2 AND CENTERING HARNESS IAW AMM 32-61-25, OPS CHECK GOOD. REMOVED AND REPLACED CENTERING SENSOR BRACKET IAW IAW MM 32-20-04