What was found
UPON CLOSING THE ACFT ENTRY DOOR AND ARMING THE EVACUATION SLIDES, F/O NOTICED AN FSS FAULT ON POSITIONS 13L & 13R. F/O OPENED THE DOOR TO SEE IF THE FAULTS WOULD RESET WITHOUT DISARMING DOOR 1L & THE EVACUATION SLIDE DEPLOYED BUT DID NOT INFLATE. MAINTENANCE AND DUTY OFFICER WERE CALLED TO ASSIST IN THE SITUATION. INSTALLED MISSING L1 DOOR MOUNTED ESCAPE SLIDE PACK IAW AMM. REMOVED AND REPLACED EMERGENCY POWER ASSIST RESERVOIR IAW AMM. INSTALLATION TEST GOOD. REMOVED 10 MAN LIFE RAFT THAT WAS INSTALLED PER ABOVE MEL. ACFT OK FOR SERVICE.