As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-4 CHECK, INSPECTION REPORTED FLOOR CHANNEL CORRODED AT BS 727D ABOVE STRINGER 28L. BLENDED CORROSION AND FOUND TO BE OUT OF LIMITS PER SRM 53-60-53. FABRICATED AND INSTALLED REPLACEMENT CHANNEL PER SRM 53-60-53, SRM 51-40-02 AND SOPM 20-41-02.