As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT SIDE EMPENNAGE - APU INLET CUTOUT AREA, THE LOWER SIDE OF THE CUTOUT, AFTER INLET. REMOVAL FOUND TO HAVE CORROSION AT BS 1825 BETWEEN STRINGER 3-6. R & R INNER STRAP AT BS 1825 ON APU RT INLET CUTOUT LOWER SIDE WITH STRAP FABRICATED IAW DWG 148N3138 SHT 1 REV C AND INSTALLED IAW DWG 148N3105 SHT 1, REV C. REPAIR IS MAJOR.