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 (AALA202201035400), MID RIGHT (AALA202201039231), AND AFT PER AMM 33-51-38.