As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FAULT LIGHT ILLUMINATED DURING APU START. RAN QRH FAULT LIGHT EXTINGUISHED. APU STARTED NORMALLY ON 2ND START. GROUNDED - YES. BITE CHECK SHOWS NO FAULTS IN CURRENT STATUS PAGE, FOUND FAULT CODE 49-41012 'NO APU ROTATION SHUTDOWN' FAULT IN FAULT HISTORY PAGE, FOUND FAULT CODE 49-41255 'START POWER UNIT SHOWS HIGH TEMPERATURE' FAULT IN MAINTENANCE HISTORY PAGE. REMOVED & REPLACED START CONVERTOR UNIT IAW AMM 49-41-61.