As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPPER ATTACH STRUCTURE CORRODED UNDER APU INTAKE DOOR. BLENDED CORROSION AND FOUND TO BE OUT OF LIMITS IAW SRM 53-00-01 FIG 101 DETAIL II. FABRICATED A NEW ATTACH STRUCTURE IAW DRAWING 148T3120, AND INSTALLED IAW DRAWING 148T3210, AND SRM 51-40-02 PAR 4,7. AIRCRAFT GROUNDED.