As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - LANDING GEAR FAILED TO MOVE TO UP POSITION DURING ATTEMPTED GEAR RETRACTION AFTER TAKEOFF. AIRCRAFT RETURNED TO STATION WITHOUT INCIDENT. MAINTENANCE CLEANED ELECTRICAL CONNECTION AT NOSEWHEEL STEERING ISOLATION VALVE P/N A1424D. PERFORMED LANDING GEAR RETRACTION CHECK. ALL OPERATIONS NORMAL. AIRCRAFT RETURNED TO SERVICE. (W)