As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INTERNAL TAIL AREA ABOVE CENTER HORIZONTAL STAB, BS 1787 BETWEEN S4-5R APU INLET FWD EDGE METAL ATTACH FLANGE HAS CORROSION AT A NUT PLATE. REMOVED CORROSION ON APU INLET ATTACH FLANGE FOUND TO BE OUT OF LIMITS IAW SRM 53-80-15. REPAIRED APU INLET. MAJOR REPAIR