As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SCHEDULED MAINTENANCE, AN OPERATIONAL CHECK OF THE EMERGENCY LIGHTS SYSTEM WAS PERFORMED WITH A FAILURE TO TEST ON LIGHTS L1854, L1853, AND L5735. FOUND BATTERY POWER SUPPLY (CHARGER) WAS PROVIDING NO OUTPUT, PART REPLACED PER AIRCRAFT MAINTENANCE MANUAL 33-51-04 WITH A SATISFACTORY OPERATIONAL CHECK.