As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R-4 DOOR WAS IN THE ARMED POSTION CABIN SERVICE OPENED DOOR FROM OUTSIDE AND BLEW THE DOOR ASSIST BOTTLE AND DROPPED THE SLIDE ONTO THE TRUCK. THE SLIDE DID NOT FULLY DEPLOY BECAUSE THE TRUCK PREVENTED THE SLIDE FROM DROPPING ENOUGH TO DEPLOY.