What was found
DURING OVERNIGHT MAINTENANCE, FAULT OF THE EMERGENCY LIGHT, LEFT UNIT, DISPLAYED ON CIDS TEST PANEL. REPLACED THE BATTERY PACK ON THE LEFT EMERGENCY POWER SUPPLY UNIT, OPERATIONAL CHECK OK.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING OVERNIGHT MAINTENANCE, FAULT OF THE EMERGENCY LIGHT, LEFT UNIT, DISPLAYED ON CIDS TEST PANEL. REPLACED THE BATTERY PACK ON THE LEFT EMERGENCY POWER SUPPLY UNIT, OPERATIONAL CHECK OK.