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 133333, EMERGENCY POWER SUPPLY UNIT (EPSU) FIN# 10WL FAILED BITE TEST. REMOVED AND REPLACED EPSU BATTERY 3214-62-10 S/N 183309 WITH P/N 3214-62-10 S/N 160811. OPS TEST GOOD.