What was found
AFT CABIN FS 1640 FLOORBEAM UPPER TEE HAS CORROSION AROUND THE FASTENER HOLES (UPPER & LOWER SURFACE) BETWEEN LBL 24 & RBL 24. REMOVED CORROSION, EVALUATED AREA, ORIG..125, LOSS .042, REMAINING .083 AREA FOUND TO BE OUT OF LIMITS, CUT DAMAGE AREA, HFEC AREA, NO DEFECTS NOTED, FABRICATED A REPAIR. ALODINED, PRIMED, TOPCOATED, & INSTALLED THE REPAIR IAW SRM 53-00-51, 51-10-02, 53-00-51, REP 10, AND AMM 51-21-15.