As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN GEAR WAS CYCLING UP AND DOWN AFTER TAKEOFF, NOSE GEAR WAS UNKNOWN, RAN THE GEAR DISAGREE CHECKLIST THE QRH AND LANDED WITH THREE GREEN AFTER EMERGENCY GEAR EXTENSION GEAR DISAGREE WARNING MESSAGE. ACFT RETURNED. ADJUSTED BOTH PROXIMITY SENSORS IAW AMM 32-32-05. PERFORMED SEVERAL GEAR SWINGS AND NO DEFECT OR GEAR DESAGREE MSG IAW AMM 32-32-00. NO FAULT CODES RECORDED ON PSEU.