As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER TAKEOFF, CREW WAS UNABLE TO GET LANDING GEAR UP. WHEN MOVING HANDLE NO AMBER LIGHT ONLY GREEN AND RED LIGHTS. RETURNED TO BASE FOR LANDING. THE INABILITY TO RETRACT LANDING GEAR WAS CAUSED DUE BREAKAGE OF THE NOSE WHEEL CENTERING PROXIMITY SENSOR WIRES. NOSE WHEEL CENTERING SENSOR REPLACED IAW AMM 32-61-00.