As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE, THE PTP SHOWN MAINTENANCE MESSAGE EPSU BATTERY EMER L ATA 33-51-38 ; REF AEROMAN NT 2021-519352 WO 2021 343/1 REMOVED AND REPLACED EPSU BATTERY EMERGENCY P/N 3214-31 S/N 893374 IAW AMM 33-51-38-400-002-A AMM-33-51-38-000-002-A AND TSM-33-51-00-810-802-A