As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU OVERHEAT DETECTOR INOPERATIVE LIGHT ON WITH MASTER CAUTION. CAME ON AT 500 AND WENT OUT AT TOUCH DOWN. APU WAS NOT RUNNING. ACFT GROUNDED. PERFORMED FIM 26-10-00-810-801, ENF/APU FIRE DETECTIONS CONTROLLER MOD BITE PROCEDURE. PASSED SEVERAL TIMES. VISUALLY INSPECTED 3 EA LOOPS FOR SECURITY & PROPER ROUTING. LIGHT REMAINED OFF DURING INSPECTION. GROUND VERIFICATION SUCCESSFUL,