As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INT - DURING Q-4 CHECK, VISUAL INSPECTION FOUND 1 INCH BY 64 INCHES OF EROSION/FRETTING CORROSION ON LT/RT KEEL BEAM BS 663 - BS 727 W/W CUT OUT PANEL ATTACH FLANGES. INSTALLED REINFORCING/CHAFE STRIPS. REPAIRED PER EA 41139 SRM 51-10-1. (X)