As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT RETURNED AFTER TAKE OFF DUE TO A GEAR DISAGREE WARNING MESSAGE FOR NOSE GEAR. DECLARED AN EMERGENCY, FOLLOWED QRH AND LANDED UNEVENTFUL. RIGGED NLG UPLOCK PROXIMITY SWITCH PS3GA IAW AMM 32-33-05. COMPLIED WITH SEVERAL GEAR SWINGS. OPS CHECKED GOOD.