As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU TREND DATA SHOWS A SHIFT IN EGT. INSPECTED APU INLET AND PLENUM REF AMM 49-11-00-200-801. NO OBSTRUCTIONS FOUND. PERFORM APU BITE CHECK IAW AMM 49-61-00-700-801. NO MX MESSAGE FOUND. R & R THE INLET TEMP SENSOR T2 IAW M/M 49-61-31-401. REPLACED BOTH EGT THERMOCOUPLES IAW MM 49-71-21-401. OPS CHECK GOOD REF AMM 49-11-00-860-801. APU BITE CHECK SHOWS NO CURRENT FAULTS NOTED.