As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE VISIT. WHEN DISCONNECTING MAIN BATTERY, EMERGENCY LIGHTS WON’T TURN OFF. EMERGENCY LIGHTING SYSTEM PLACED IN SLEEP MODE IAW AMM 33-51-00 AND DEACTIVATED IAW AMM 33-51-00. EMERGENCY LIGHTS REMAIN OFF WHEN BATTERY DISCONNECTED.