As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU AUTO SHUTDOWN ON TAXI OUT, ACS FAULT ON OAP, AND STRONG ELECTRICAL SMELL IN CABIN. INSTALLED NEW STARTER PER M/M. INSPECTED APU COMP. NO PROBLEMS NOTED. REPLACED APU START RELAY. APU OPS CHECKS NORMAL. STARTER LEAK CHECK GOOD. NO FAULTS.