As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - EEL - DURING L-2 DOOR SLIDE CHANGE AND TEST THE EMERGENCY LIGHT SYSTEM FAULTED, FOUND MIDDLE LT CABIN EMERGENCY POWER SUPPLY UNIT HAD INTERIOR LIGHTS FAULT. MAINTENANCE REMOVED AND REPLACED EMERGENCY POWER SUPPLY UNIT 11WL IAW 33-51-32-401, OPERATIONAL CHECK WAS GOOD.