As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED AND IS IN CHECK FOR SCHEDULED MX. DURING EPSU BATTERIES CAPACITY TEST 13WL FAILED. REPLACEMENT REQUIRED I.A.W. CMM 33-51-07 REV. 05. REPLACEMENT OF EPSU (13WL) BATTERY PERFORMED I.A.W. AMM 33-51-38-04 CONF 00 REF 97.