As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AC HAS BEEN OUT OF SERVICE FOR EXTENDED MAINTENANCE DUE TO TAIL STRIKE. REFERENCE NR 133334, EMERGENCY POWER SUPPLY UNIT (EPSU) FIN# 11WL FAILED BITE TEST. REMOVED AND REPLACED EPSU BATTERY 3214-62-10 S/N 183308 WITH P/N 3214-62-10 S/N 161149. OPS CHECK GOOD.