As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FAULT LIGHT DURING START. ACFT GROUNDED. STARTED AND OPERATED APU. APU STARTS AND OPERATES NORMALLY. PERFORMED FIM 49-55 TASK 801 E(1) THRU (6). NO FAULTS FOUND. IAW FIM, SOME FLAME IN EXHAUST DURING START IS NORMAL DURING CONSECUTIVE STARTS. NO CURRENT/NEW FAULTS DURING NUMEROUS RUNS, IAW FIM 49-61-00.