As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOTH EMERGENCY LIGHTS BY OVER WING EXIT WILL NOT STAY ILLUMINATED. EMERGENCY BATTERY CHARGE BY APU FOR 6 HOURS. PERFORM OPERATIONS CHECK OF EMERGENCY LIGHTS SYSTEM. OPERATIONS CHECK GOOD, IAW CRJ 900 AMM 33-51-00-710-802 A01 NO DEFECTS NOTED.