As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON INTERIOR INSPECTION NOTED MULTIPLE EMERGENCY LIGHTS OUT IN CABIN, POWERED BY BATTERY PACK #1 REMOVED AND REPLACED #1 BATTERY CHARGER IAW AMM 33-51-17, AND REMOVED AND REPLACED #1 EPSU BATTERY PACK IAW AMM 33-51-17, ALL OPS TEST GOOD, NO DEFECTS NOTED AT THIS TIME.