As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU HAS PREVIOUS REPORTS OF FAULT LIGHT AND FAULT MESSAGE 49-61223. INLET TEMP SENSOR SHOWS SHORT CIRCUIT. ACFT GROUNDED. REMOVED AND REPLACED APU INLET TEMP SENSOR IAW AMM 49-61-31. RAN APU AND PERFORMED INSTALLATION TEST AND APU BITE PROCEDURE IAW AMM 49-61-00. NO FAILURES FOUND.