As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHTS STAY ON WHEN SWITCH IS IN THE ARM POSITION, AIRCRAFT ON THE GROUND TRIED WITH GPU CONNECTED AND GPU DISCONNECTED. CORRECTIVE ACTION: REPLACED #1 AND #2 EMERGENCY LIGHTING BATTERY OPS CHECK GOOD WORD DONE IAW EMBRAER EMB-505 AMM