As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN EMERG LIGHT: EMERGENCY LIGHTS FAIL TEST WITH SWITCH IN ARM AND MAIN BATTERIES OFF. THEY DO NOT ILLUMINATE. RAN APU FOR 20 MINS WITH SAME RESULT. // SIGNOFF // REMOVED BATTERY CHARGER SYSTEM PN:CBS28·1 SN:2698M INSTALLED CUSTOMER SUPPLIED BATTERY CHARGER SYSTEM PN:CBS28-L SN:007786. IAW MODEL 680 AMM 33-50-00. OPS CHECK GOOD NO DEFECTS NOTED.