As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - FLT 6006 - CARGO DOOR PRIMARY AND SECONDARY WARNING LIGHT CAME ON DURING CLIMB AT 9,000 FEET. CREW RETURNED TO STATION. DOOR CLOSING PROCEDURES OR DOOR HARD TO CLOSE. CLEANED AND LUBED CARGO DOOR CLICK CLACKS AND SWITCHES. DOOR CYCLED MULTIPLE TIMES WITH NO DEFECTS NOTED. TEST FLIGHT WAS THEN COMPLETED WITH NO DEFECTS NOTED. (M)