What was found
FWD PIT, AFT SECTION , JUST BEFORE THE A/C BAY, FLOOR SUPPORT CHANNEL HAS CORROSION AT SEVERAL SPOTS. BS 500I LBL 21 - RBL 21. GROUNDED - YES. REMOVED CORROSION FROM FLOOR SUPPORT AT 500I, LBL 21 - RBL 21 IAW ASA B737-800 SRM 51-10-02, FLOOR SUPPORT FOUND TO BE OUT OF LIMITS IAW ASA B737-800 SRM 53-00-53-1A FIG 103 DETAIL D. ORIGINAL THICKNESS IS .080, REMOVED .013 REMAINING .067. REMOVED CORRODED SUPPORT AND INSTALLED NEW SUPPORT IAW ASA B737-800 SRM 51-40-02. APPLIED CIC IAW ASA B737-800 AMM 51-05-01, UT GAUGE USED T8225S. NEW SUPPORT PO:869104.8 REMOVED DOT.