As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FAULT FOR FORWARD LEFT EMERGENCY POWER SUPPLY UNIT DISPLAYED DURING SYSTEM TEST. MAINTENANCE REPLACED THE FORWARD LEFT EMERGENCY POWER SUPPLY UNIT (AALA202606290298) AND BATTERY (AALA202606291081) PER AMM 33-51-38. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO FAULTS NOTED.