As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR DISAGREE ON TAKE OFF NOSE GEAR WOULD NOT COME UP. COMPLIED WITH QRH. RETURNED TO FIELD. (FLT4281) FO: 06/28/2018 CLOSED REMOVED AND REPLACED PROX SENSOR HARNESS AND MOUNTING BRACKET IAW CMM AND AMM. PERFORMED FUNCTIONAL TEST OF LANDING GEAR SYSTEM IAW AMM. ALL OPS CHECKS GOOD.