As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AIRCRAFT INSPECTION FOUND PART OF APU INLET SCREEN MISSING PART OF ITS WIRE MESH. SUSPECTED PART WAS INGESTED BY APU DURING OPERATION. BORESCOPED APU INLET COMPRESSOR AND DAMAGE TO LEADING EDGES OF ALL THE BLADES WAS FOUND. THE APU INLET SCREEN IS THE LATEST DESIGN. APU TT: 2,819 HOURS. TOTAL TIME ON INLET SCREEN UNKNOWN. (X)