What was found
AFT CABIN FLOOR R-2 DOOR LOWER SILL INNER CHORD HAS SEVERAL AREAS OF CORROSION. GROUNDED - YES. REMOVED CORROSION ON THE R2 LOWER SILL INNER CHORD, ORIGINAL THICKNESS 0.080, REMOVED 0.014, REMAINING THICKNESS 0.066 AND FOUND TO BE OUT OF LIMITS IAW B737-800 SRM 53-70-15-1A-1. REMOVED AND REPLACED WITH NEW INNER CHORD, PART #147A8540-8 IAW B737-800 SRM 51-40-02 AND BOEING DRAWING 147A8501 REV B SHEET 91-92. DOT G971 REMOVED.