As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU EGT TRENDING HIGHER THAN NORMAL. GROUNDED - YES. ENGINEERING REQUEST - REMOVED AND REPLACED APU EGT THERMOCOUPLES 1 & 2 PER AMM 49-71-21. COMPLETED INSTALLATION TEST FOR EGT THERMOCOUPLES 1 AND 2. TEST GOOD PER AMM 49-71-21.THIS COMPLETES STEPS FOR TSR.