As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE: DON'T PAST TEST EMERGENCY LIGHT PTP SHOWS EPSU EXT LOAD AFT L BATTERY; REF AEROMAN WO 2022-283/1 NR2022-558321. REMOVED AND REPLACED THE BATTERY OF THE EMERGENCY POWER SUPPLY UNIT FIN 13WL IAW AMM 33-51-38-000-002-A AND 33-51-38-400-002-A DONE BY C. GOMEZ 8616907 CHECKED BY M. CALDERON 8612315.'