As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER T/O CREW WERE UNABLE TO SELECT GEAR UP. WITH GEAR SELECTOR IN UP POSITION THEY HAD NO YELLOW DOOR LIGHTS AND STILL 3 GREENS AND 3 REDS AND LEVER TRANSIT LIGHT. THEY SELECTED LEVER DOWN, BRIEFED CREW AND PAX AND RETURNED TO BASE FOR NORMAL LANDING. INVESTIGATION/ACTION THE UNABILITY TO RETRACT LANDING GEARS WAS CAUSED DUE BREAKAGE OF THE NOSE WHEEL CENTERING PROXIMITY SENSOR WIRES. NOSE WHEEL CENTERING SENSOR REPLACED IAW AMM 32-61-00.