As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU CT5 ATP EGT TREND DATA SHOWS EGT HAS SHIFTED ABOVE THE ESTABLISHED THRESHOLD. ACCOMPLISHED APU ENG INSP REF AMM TASK 49 21 00 200 801 FOUND DAMAGE TO 2ND STAGE TURB BLADES TRAILING EDGES. APPEARS TO BE ALL BLADES. REPLACED APU PER T/C 78349010. LEAK AND OPS CHECK GOOD.