As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR DISAGREE WARNING MESSAGE ON DEPARTURE. RAN QRH MESSAGE CLEARED. RETURNED TO FIELD FLIGHT 4266. FILED CLOSED. FOUND RT MLG UPLOCK TARGET TO BE UNSECURE AND OUT OF RANGE. ADJUSTED AND RESECURED RT MLG UPLOCK TARGET TO WITHIN LIMITS, REF AMM. PERFORMED EXTENSION & RETRACTION CHECK, REF AMM. NO DEFECTS NOTED. PLEASE REFERENCE AML 511249.