As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APU START THE FAULT LIGHT CAME ON. RAN QRH WAITED 5 MINUTES. MADE ANOTHER ATTEMPT FAULT LIGHT CAME BACK ON. ACFT GROUNDED. ACCOMPLISHED INLET OVERHEAT SHUTDOWN FAULT PROCEDURE IAW TASK FIM 49-90, TASK 802 BY PULLING & CYCLING CIRCUIT BREAKERS. ORIGINAL FAULT CODE WAS 49-91006 APU STARTED NORMAL NO HISTORY PAST 90 DAYS.