As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE MAINTENANCE, MX FOUND EXIT ROW IDENTIFIER LIGHT OUT AT ROW 12A INOPERATIVE. MX REMOVED AND REPLACED EMERGENCY LIGHT POWER SUPPLY ASSY AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. AC WAS APPROVED TO RETURN TO SERVICE. (K)