As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU DETECTOR INOPERATIVE WITH OVERHEAT MASTER CAUTION DURING APPROACH. INTERMITTENT ILLUMINATIONS THROUGHOUT APPROACH WITH APU OFF. ACFT GROUNDED. PERFORMED FIM TASK 2610, TASK 801 NO FAULTS FOUND, NO HISTORY PAST 30 DAYS, SUSPECT NUISANCE FAULT DUE TO APU NOT RUNNING. RAN APU NO FAULTS FOUND. PERFORMED LIGHT SYS TEST- OK FOR SERVICE. ACFT OK FOR SERVICE.