As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEVEL 1 CORROSION, NR 4 PYLON AFT BULKHEAD 'T' CHORDS HAVE LIGHT SURFACE CORROSION. REMOVED CORROSION IAW BOEING SRM 51-10-01 AND SB 747-54-2159 R2 REPROTECTED IAW BOEING SRM 51-10-02, MM 51-24-11 NON ROUTINE CARD S/N 6004 WITHIN SRM 54-10-01 LIMITS.