What was found
AIRCRAFT IN BASE MAINTENANCE: CABIN EMERGENCY LIGHTING SYSTEM, CIDS FAULT EPSU AFT LEFT BATTERY POWER SUPPLY. MAINTENANCE REPLACED FORWARD LEFT EPSU IAW AMM 33-51-38.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT IN BASE MAINTENANCE: CABIN EMERGENCY LIGHTING SYSTEM, CIDS FAULT EPSU AFT LEFT BATTERY POWER SUPPLY. MAINTENANCE REPLACED FORWARD LEFT EPSU IAW AMM 33-51-38.