As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE EXTERIOR SKIN AROUND APU EXHAUST HAS FRETTING CORROSION WHERE THE APU EXHAUST SHIELD IS INSTALLED. (C-CHECK RO 2/27/2025) PERFORMED REPAIR OF EXTERIOR SKIN AROUND APU EXHAUST FRETTING CORROSION WHERE THE APU EXHAUST SHIELD IS INSTALLED REF REO 601R-53-61-8275 REV -A DATED 2025-02-21. COMPLIED WITH SKYWEST TASK CARD 51-900-1003-SKY, AND M-337. CHECKS GOOD.