As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE ANNUAL EMERGENCY LIGHT BATTERY PACK DEEP CYCLE CHECK THE POWER SUPPLY FOR THE ESCAPE PATH LIGHTING AT ROWS 1, 2, 3 A&B WERE FOUND TO BE DEFECTIVE. MAINTENANCE REPLACED THE ASSOCIATED POWER SUPPLY AND THE SYSTEM OPERATED NORMALLY.