As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - EEL - DURING INSPECTION THE EMERGENCY LIGHTING SYSTEM FAILED TEST. MAINTENANCE REMOVED AND REPLACED EMERGENCY POWER SUPPLY UNITS AND BATTERY PACKS AT RT OVERWING EXIT (12WL), AND LT AFT (13WL) IAW AMM 33-51-38-401, FUNCTIONAL TEST WAS GOOD.