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 OPERATIONAL TEST OF EMERGENCY LIGHTS FAIL ON EMERGENCY LEFT AND FORWARD LEFT POSITION. REMOVED AND REPLACED EMERGENCY POWER SUPPLY UNIT (AALA202404150256) AND BATTERY ON FORWARD LEFT POSITION 10WL (AALA202404156358) AND BATTERY ON EMERGENCY LEFT POSITION (11WL).