As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - FLIGHT 2416 - FLIGHT RETURNED TO FIELD WHEN DURING THE CLIMB, THE GEAR FAILED TO RETRACT. MAINTENANCE INSPECTED THE AIRCRAFT AND REPLACED THE NOSE LANDING GEAR WOW 2 CENTERING HARNESS. THE OPERATIONAL CHECKS WERE GOOD AND THE AIRCRAFT WAS RETURNED TO SERVICE.