As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FAULT LIGHT ON FIRST START ATTEMPT. ACFT GROUNDED. ACCOMPLISHED FIM 49-40 TASK 821. NO CURRENT FAULTS. HISTORY SHOWS MESSAGE 49-41254. HAS HISTORY OF PRIOR OCCURRENCES. REF AMM 49-41-61-400-801, R & R APU START CONVERTER UNIT. OPS TEST NORMAL.