As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON ARRIVAL, THE L1 DOOR WAS OPENED FROM OUTSIDE. THE EPAS SYS ACTIVATED & THE DOOR OPENED SUDDENLY. THE SLIDE DROPPED ONTO THE JETWAY & DID NOT INFLATE. R & R L1 DOOR MOUNTED ESCAPE SLIDE PACK IAW AMM 25-66-01-400-801. THE ACFT WAS GNDED. SEE ALSO SDR AALA20160221005.