As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IT HAS BEEN REPORTED BY THE FLIGHT CREW, THE EMERGENCY EVACUATION LIGHTING SYSTEM HAS BEEN FOUND TO BE DEFECTIVE. MX R & R THE APPROPRIATE BATTERIES IN THE POWER SUPPLY BATTERY PACK AND MADE ALL REQUIRED CORRECTIONS. OPS CHECK WAS ACCOMPLISHED IAW AMM 33-50-00, SYS OPS CHECK WAS NORMAL. THE ACFT HAS BEEN RETURNED TO SERVICE.