As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU STINGER HAS CORROSION ON LH AND RH SIDE UPPER SKINS. TEXTRON AVIATION ENGINEERING MEMO DQ34035M1 DATED MAR 21, 2022; 680A-0074 (N533QS) APU STINGER SIDE SKIN (CORROSION) DEEMED THE REPAIR MINOR IN SCOPE. REPAIR OF CORROSION ACCOMPLISHED PER DQ3435M1.