As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR DISAGREE WARNING AFTER TAKE OFF. RETURNED TO FIELD. LANDED WITHOUT INCIDENT. (FLT#4079) CLOSED INSPECTED AND FOUND THE NLG TOW GUARD COLLAR HAD SHIFTED UP AND DAMAGED THE NLG OLEO-CENTERED/EXTENDED PROX SENSOR BRACKET. DEFERRED IAW MEL.