As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-3 CHECK, INSPECTION REPORTED CABIN EMERGENCY LIGHT SYSTEM TEST SHOWED EPSU INT LOADED AFT LEFT FAULT. FOR TROUBLESHOOTING PURPOSES, DISCONNECTED CONNECTOR TO AFT LEFT EPSU (13WL). RECONNECTED CONNECTOR AND PERFORMED OPS CHECK PER AMM 33-51-38-000-001, AMM 33-51-38-400-001. OPS CHECK GOOD PER AMM 33-51-00-710-001.