As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT ENTRY DOOR SLIDE FELL OUT WHEN OPENING DOOR. PILOT THOUGHT DOOR WAS DISARMED. FOUND DOOR OPEN AND SLIDE ON CREW STAIRS. R1 DOOR WAS IN ARMED POSITION. SLIDE HAD PINS PULLED ON YELLOW COVER BUT DID NOT INFLATE. DOOR ASSIST CYLINDER DEFLATED. INSTALLED R1 DOOR ESCAPE SLIDE IAW MM 25-66-01-4.