As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA- NOSE GEAR SLOW TO RETRACT. THEN THE NOSE LANDING GEAR INTRANSIT LIGHT ILLUMINATED. GEAR DOORS OPENED THEN CLOSED ON CLIMBOUT. RETURNED TO FIELD. AIRCRAFT LANDED WITHOUT INCIDENT. REMOVED AND REPLACED NOSE LANDING GEAR SOLENOID SEQUENCE VALVE. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.