As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER TAKEOFF THE LANDING GEAR LEVER WOULD NOT GO UP. RETURNED FOR LANDING. CONTRACT MAINTENANCE DISCOVERED A FAULTY NLG WOW SENSOR. THIS WAS REPLACED AND ADJUSTED IAW AMM 32-62-01AND THE GEAR SWUNG SEVERAL TIMES SUCCESSFULLY. ACFT RELEASED FOR SERVICE.