As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FAULT ON 2 START ATTEMPTS. GROUNDED - YES. INTEROGATED SYSTEM FOUND MX MESSAGES 49.4142 & WHEN START ATTEMPTED NEW MX MSG 49.41254. Y 30507ACCOMPLISHED IFIM TASK 49-40-00-810-805 BOTH MX MESSAGES NOT ACTIVE AND APU STARTED SUCCESSFULLY. REF LP 60911282 FOR ADMINISTRATIVE DEFERRAL.