As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ACCOMPLISHMENT OF AD 87-23-01, FOUND AFT PRESSURE BULKHEAD BS 2360 AT STRINGER 50, SKIN IS CORRODED (SKIN) UNPRESSURIZED AREA. REMOVED CORROSION IAW B747 SRM 51-10-01. SKIN FOUND OUT OF LIMITS IAW B747 SRM 53-30-01. MATERIAL ID 2024-T3 IAW B747 SRM 53-30-02. INSTALLED DOUBLER IAW B747 SRM 53-30-03. NON-ROUTINE TASK CARD NUMBER B0083-09-N-00046.