As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FAILED TO START ON TAXI IN 3 ATTEMPTS. ACCOMPLISHED FIM 49-11 F/T 458 AND BITE ECU AND FAULTED START CIRCUIT CLEARED MESSAGE AND PERFORMED APU OPERATIONAL CHECKED IAW AMM 49-11-00/501 AND AIR /ELECTRICAL OPS CHECKED OK WILL REQUIRE APU COLD SOAK START.