As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REFERENCE NR 5001260509-0050. AIRCRAFT WAS NOT GROUNDED AND IS IN CHECK FOR SCHEDULED MX. DURING EPSU BATTERIES CAPACITY TEST, EPSU 13WL 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 13WL BATTERY IAW AMM 33-51-38-400-002-A/REV 95 PART ON: P/N: 3214-31, S/N: 904163, B/N: N322FR5040. MX ACTION IS ACCEPTABLE.