As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - FOUND CORROSION ON THE BS 1016 AFT PRESSURE BULKHEAD FWD FACE-BOTTOM OF THE CENTER (LWR) STIFFENER CHANNEL. CORROSION IS OUT OF LIMITS IAW B737-300 SRM 53-80-08 IAI FIG 101. REPAIRED CENTER (LWR) STIFFENER CHANNEL BS 1016 AFT PRESSURE BULKHEAD IAW B737-300 SRM 51-70-11- 0G FIG 1.