As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHL - WHILE PARKED AT A REMOTE GATE, THE L1 DOOR WAS ACCIDENTALLY OPENED WHILE THE EMERGENCY EVACUATION SLIDE WAS STILL ARMED. THE SLIDE DEPLOYED, BUT DID NOT INFLATE. MAINTENANCE REPLACED THE EMERGENCY EVACUATION SLIDE AT THE L1 DOOR. OK FOR SERVICE. (S)