As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE TROUBLESHOOTING PRESSURIZATION LEAKS WITH PRESSURIZATION CART, FOUND AIR LEAKAGE AT FORWARD PRESSURE BULKHEAD AT CENTER BOX , .80 INCH AND .30 INCH CRACK FOUND AT RIVET CONNECTING ANGLE TO BULKHEAD. MANUFACTURER HAD NO APPROVED REPAIR. OBTAINED DER APPROVAL AND RIVETED PATCH WAS INSTALLED. SUBMITTER SUGGESTS VISUAL INSPECTION OF AREA OFTEN ON OLDER AIRCRAFT.