What was found
MAIN CABIN FLOOR BEAM STA 986 HAS MULTIPLE AREAS OF CORROSION. GROUNDED - YES. BLENDED CORROSION, ORIGINAL THICK 0.150 IAW B737-800 SRM 53-70-51-0I-1. REMAINING THICK AT RBL47 0.105, REMOVED 0.045. DOUBLE DRILLED HOLE AT LBL-38. OUT OF LIMITS IAW B737-800 SRM 53-70-51-1A-1. CUT OUT DAMAGE STA 986 LBL50-RBL50 AND CUT MACHINED INTERCOSTALS STA 986-1006 LBL32 AND RBL32 IAW B737-800 SRM 53-70-51-2R-4 ALTERNATIVE 1. FABRICATED 'T' CHORD SECTION, SPLICE ANGLES, 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 CORNER FITTINGS, 'T' CHORD SECTION, SPLICE ANGLES, STRAPS, SHEAR TIES AND MACHINED INTERCOSTALS IAW B737-800 SRM 53-70-51-2R-4 ALTERNATIVE 1.