As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-CHECK, AN ATTEMPT TO OPS CHECK L2 DOOR ESCAPE SLIDE SYS, WITH THE SLIDE PLACE AND THE GIRT BAR INSTALLED THE DOOR WAS OPENED BUT THE SLIDE FAILED TO INFLATE. UPON INVESTIGATION OF THE SLIDE IT WAS FOUND TO HAVE THE SAFETY PIN STILL INSTALLED, AFTER REMOVAL OF THE SAFETY PIN THE SLIDE OPERATED/INFLATED NORMAL.