As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW RECEIVED A FUSELAGE DOOR WARNING AT 13000 FT. RT FWD EXIT DOOR SHOWED OPEN. CREW COMPLETED QRH AND PRESSURIZATION WAS NORMAL. LIGHT WENT OFF ON DECENT THRU 12000 FT. AN EMERGENCY WAS NOT DECLARED AND CREW LANDED WITHOUT INCIDENT. MX RIGGED FWD RT DOOR PROXIMITY SENSOR IAW AMM AND OPS CHECKED GOOD. ACFT IS GOOD FOR SERVICE.