As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT EMERGENCY LIGHTS ILLUMINATE WHEN NO POWER APPLIED TO AIRCRAFT. REMOVED & REPLACED #400 EMERGENCY BATTERY CHARGER ASSY IN REF TO AMM 33-50-04-000/400-801-A. PERFORMED EMERGENCY LIGHT SYSTEM OPS CHECK IAW W/C 33-70-17. OPS CHECK GOOD. SEE HA-300 SEQ #6 FOR FURTHER TROUBLESHOOTING ON PACKAGE DATED 5-4-21.