What was found
AIRCRAFT WAS NOT GROUNDED: DURING SYSTEM TEST ON EMERGENCY LIGHT SYSTEM A BATTERY FAULT MESSAGE FOR THE FORWARD LEFT EMERGENCY POWER SUPPLY UNIT DISPLAYED - MAINTENANCE REPLACED THE BATTERY PER AMM 33-51-38
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT WAS NOT GROUNDED: DURING SYSTEM TEST ON EMERGENCY LIGHT SYSTEM A BATTERY FAULT MESSAGE FOR THE FORWARD LEFT EMERGENCY POWER SUPPLY UNIT DISPLAYED - MAINTENANCE REPLACED THE BATTERY PER AMM 33-51-38