As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - FLIGHT 2333 - THE AIRCRAFT RETURNED TO FIELD WHEN AFTER TAKEOFF THE LANDING GEAR FAILED TO RETRACT. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND THE PSEU FAULT NW CENTERING FAULT 1. THE NOSE WHEEL CENTERING PROX SENSOR SHOWS BETWEEN TOO FAR AND FAR WITH THE NOSE LANDING GEAR AT CENTER. THE RVDT, AND STEERING HARNESS WAS REPLACED AND THE NOSE WHEEL STEERING SYSTEM WAS RIGGED. OPERATIONAL CHECKS WERE PERFORMED AND CHECKED GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.