What was found
MAIN CABIN FLOOR SUPPORT AT STA 986.5 HAS CORROSION ON THE UPPER SURFACE (MARKED). GROUNDED - YES. BLENDED AREA. ORIGINAL THICKNESS 0.150 IAW B737-800 SRM 53-70-51-0I-1. REMAINING THICK AT RBL 43 0.050, REMOVED 0.100, REMAIN THICK AT RBL 4 0.085, REMOVED 0.065, OUT OF LIMITS IAW B737-800 SRM 53-70-51-1A-1. REMOVED DAMAGE, FABBED REPAIR "T" CHORD, SPLICES, STRAPS, CORNER FITTINGS, AND SHEAR TIES IAW B737-800 SRM 53-70-51-2R-4 ALTERNATIVE 1. ALODINED IAW B737-800 SRM 51-20-01. PRIMED IAW BOEING SOPM 20-41-02, INSTALLED REPAIR "T" CHORD, SPLICES, STRAPS, CORNER FITTINGS, AND SHEAR TIES IAW B737-800 SRM 53-70-51-2R-4 ALTERNATIVE 1, GPM 05-00-62 FOR CORROSION LEVEL DETERMINATION.