As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: CIDS SHOWED 2 EMERGENCY POWER SUPPLY UNIT BATTERIES BAD, RIGHTHAND EMERGENCY AND RIGHTHAND AFT. MAINTENANCE REPLACED 1 EMERGENCY POWER SUPPLY UNIT BATTERY AT RIGHTHAND EMERGENCY AND 1 EMERGENCY POWER SUPPLY UNIT BATTERY AT RIGHTHAND AFT (SEE AALA202003079010).