What was found
AIRCRAFT WAS NOT GROUNDED: DURING PERIODIC SERVICE CHECK MAINTENANCE FOUND FAULT MESSAGE ON FLIGHT ATTENDANT PANEL EMERGENCY POWER SUPPLY UNIT INTERNAL LOAD FORWARD LEFT AND FAULT MESSAGE EMERGENCY POWER SUPPLY UNIT INTERNAL LOAD EMERGENCY RIGHT / EMERGENCY LEFT. MAINTENANCE REPLACED LIGHT BULBS IN THE EMERGENCY EXIT SIGNS AT THE FORWARD LEFT POSITION (AALA202208110730), THE RIGHT EMERGENCY EXIT POSITION (AALA202208116627) AND THE LEFT EMERGENCY EXIT POSITION (AALA202208115376) PER AMM 33-51-00. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.