As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: EMERGENCY POWER SUPPLY BATTERIES FAILED OPERATIONS TEST; MID LEFT AND MID RIGHT AND AFT. REMOVED AND REPLACED EMERGENCY POWER SUPPLY UNIT BATTERIES MID LEFT, MID RIGHT (AALA202201039231), AND AFT (AALA202201034018) PER AMM 33-51-38.