As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE GEAR DISAGREE DURING CLIMB OUT, AIRSPEED 170KTS. NOSE GEAR STAYED DOWN AND GREEN MAIN GEAR RETRACTED NORMAL. RAN QRH GEAR EXTENDED NORMAL, NORMAL LANDING. REMOVED AND REPLACED NLG CENTERING PROXIMITY SENSOR BRACKET IAW CMM 32-20-04. REMOVED AND REINSTALLED TOW GUARD COLLAR IAW TS 00871R6 WITH CORRECT SHIMMING. PERFORMED OPS CHECKS OF NLG. ALL CHECKED GOOD.