As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REFERENCE LTPR NR 5001334236-0010 AIRCRAFT WAS NOT GROUNDED AND IS IN CHECK FOR SCHEDULED MX. DURING INCOMING CHECKS FOUND EPSU BATTERY 13 WL INOP. REPLACEMENT REQUIRED IAW AMM 33-51-38-000-002-A REV.99. REPLACED EPSU BATTERY 13WL IAW AMM 33-51-38-400-002 REV. 99.