As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE - R4 DOOR SLIDE PACK DEPLOYED DUE TO EPAS (EMERGENCY POWER ASSIST SYSTEM) BATTERY FAILURE, SLIDE PACK FAILED TO INFLATE DUE TO EPAS RESERVOIR DEPLETED. REPLACED R4 DOOR SLIDE-RAFT PER JOB CARD 25-94-25 AND AMM 25-66-01. REPLACED R4 DOOR EPAS RESERVOIR PER AMM 52-11-22, INSTALLATION CHECKS GOOD.