As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APU SHUT DOWN, APU FAULT LIGHT ILLUMINATED. WAITED 5 MINUTES AND FAULT LIGHT EXTINGUISHED. TRIED TO START APU TWICE AND BOTH TIMES APU FAILED TO START AND FAULT LIGHT ILLUMINATED. GROUNDED - YES. ACCOMPLISHED FIM 49-60 TASK 801 & 49-60 TASK 812. REMOVED INLET TEMP SENSOR, FOUND MOISTURE, REINSTALLED TEMP SENSOR PER AMM 49-61-31. APU STARTS & OPERATES NORMAL AND NO CURRENT FAULTS.