As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT FACE OF FRAME UNDER AVIONICS FLOORBOARD AT FS 319.70 BY DRAIN TUBE APPEARS TO HAVE CORROSION UNDER PAINT. REMOVED CORROSION IAW SRM 51-21-00, 51-21-06 AND 53-00-00 FIGURE 101 AND FOUND TO BE OUT OF LIMITS. REPLACED FRAME IAW SRM 51-42-06