As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - AIRCRAFT RETURNED TO FIELD WHEN DURING CLIMB THE FUSELAGE DOOR WARNING LIGHT ILLUMINATED. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND THE FORWARD BAGGAGE DOOR HANDLE NOT PROPERLY STOWED. THE DOOR HANDLE WAS CLEANED, LUBED, AND PROPERLY STOWED. THE DOOR WAS OPERATED WITH NO DISCREPANCIES NOTED. AIRCRAFT RETURNED TO SERVICE.