As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DTW OPEN RIGHT AFTER LOAD CREW EXITED ACFT. MX FOUND L1 DOOR OUTSIDE DOOR ARMING HANDLE PUSHED IN FLUSH TO ACFT. ATTEMPTED TO OPEN DOOR & DOOR BLEW WITH SLIDE FALLING OUT ONTO THE CREW STAIRS. INSPECTED DISARM HANDLE & ALL OPERATION IS NORMAL & NO DAMAGE TO L1 DOOR OR TRACK. R & R L1 SLIDE ASSEMBLY IAW AMM 25-61-01-2-0.