As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING REMOVAL OF ANCHOR NUT FROM OUTER STRAP ON THE APU AIR INLET DOOR CUT OUT FOUND OUTER STRAP FOUND EXFOLIATION CORROSION AT BS 1825 STRINGERS 3 - 6R. FOUND OUT OF LIMITS IAW SRM 53-80-15 TABLE 101 ALLOWABLE DAMAGE 1 REV 112. STRAP REMOVED AND REPLACED IAW DWG 148N3138 SHT 1 REV C, AND DWG 148N3105 SHT 1 REV C. REPAIR CLASSIFIED AS MAJOR.