As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REFERENCE NR 5001260509-0040. AIRCRAFT WAS NOT GROUNDED AND IS IN CHECK FOR SCHEDULED MX. DURING EPSU BATTERIES CAPACITY TEST, EPSU 12WL BATTERY FAILED CAPACITY TEST. REPLACEMENT IS REQUIRED IAW AMM 33-51-38-000-002-A/REV 95 AND AMM 33-51-38-400-002-A/REV 95. INSTALLED EPSU 12WL BATTERY IAW AMM 33-51-38-400-002-A/REV 95 PART ON: P/N: 3214-31, S/N: 935043, B/N: N322FR5043 MX ACTION IS ACCEPTABLE.