As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION NOTED ON LOWER SEAL PLATE ON FORWARD SIDE OF AFT PRESSURE BULKHEAD. DURING FASTENER REMOVAL TWO 3 INCH CRACKS WERE NOTED IN THE LOWER FLANGE JUST FORWARD OF THE RADIUS OF THE PART. PART IS IN PROCESS OF BEING REPLACED. SUSPECT PART BECAME PRELOADED DURING INITIAL INSTALLATION OF FASTENERS AND FAILED OVER TIME.