As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT HAS BEEN OUT OF SERVICE FOR EXTENDED MAINTENANCE DUE TO TAIL STRIKE. REFERENCE NR 133336, EMERGENCY POWER SUPPLY UNIT (EPSU) FIN# 13WL FAILED BITE TEST. REMOVED AND REPLACED EPSU BATTERY 3214-62-10 S/N 182803 WITH P/N 3214-62-10 S/N 004899. OPS CHECK GOOD.