As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHTS EXTERIOR WILL NOT COME ON, EXTERIOR EMERGENCY LIGHTS - ALL - ACFT NOT OPERATED AT NIGHT. R & R EMERGENCY LIGHTS BATTERY PACK NR 4 IAW AMM 33-51-17. OPS CHECK OF EXTERIOR AND INTERIOR EMERGENCY LIGHTS GOOD. NO FURTHER DEFECT NOTED.