As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CARGO DOOR LIGHT ILLUMINATED CREW DECLARED AN EMERGENCY. FLIGHT DID NOT LOSE PRESSURIZATION. FLIGHT HELD FOR 20 MINUTES TO BURN 800 LBS OF FUEL TO LAND AT OR BELOW MAX STRUCTURAL WEIGHT. MX FOUND DOOR HANDLE IN UNLOCKED POSITION. MX CYCLED DOOR, OPS CHECKED GOOD.