As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINES STARTED, CABIN EMERGENCY LIGHTS ILLUMINATED AND WOULD NOT EXTINGUISH EVEN AFTER CYCLING EMER LT SWITCH. CORRECTIVE ACTION: PERFORMED OPERATIONAL CHECK OF EMERGENCY LIGHTS WITH ENGINES RUNNING , FOUND LIGHT TO ILLUMINATE IN ARM POSITION, INSTALLED SERVICEABLE BATTERIES AND VERIFIED PROPER OPERATION IAW EMB505 AMM 33-52-01