As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STIFFENER AND STRINGER FOUND CORRODED IN TORQUE BOX APU BAY. SUBMITTER SUGGESTED MORE FREQUENT AND MORE DETAILED INSPECTIONS OF THE SECTION 48 TORQUE BOX AREA INCORPORATED INTO THE CPCP PROGRAMS. THIS COULD HAVE AFFECTED MORE CRITICAL AREAS HAD IT NOT BEEN CAUGHT AT SUCH AN EARLY STAGE. EVEN AT THIS STAGE, THE REPLACMENT OF THESE ITEMS WAS NECESSARY TO ENSURE A COMPLETE CORRECTIVE ACTION.