As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN HEAVY MAINTENANCE PERFORMING INSPECTION IT WAS NOTED THAT THE AFT PIT FLOORBEAM IS CORRODED AT B.S. 950D LBL 60 - LBL 70. CORROSION FOUND TO BE OUT OF LIMITS, REMOVED DAMAGED SECTION DIM 16.5". FABRICATED UPPER CHORD, 2 EA SUPPORT ANGLES, & 2 EA STRAPS.