As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR DISAGREE WARNING ON GEAR RETRACTION. NOSE GEAR INDICATED UNSAFE. COMPLIED WITH QRH TO GET 3 GREEN. RETURNED TO FIELD. (FLT#4985) CLOSED ADJUSTED NLG PROX SENSOR PX22 IAW AMM. PERFORMED MULTIPLE GEAR SWINGS IAW AMM. ALL OPS CHECKS GOOD.