What was found
MAIN CABIN AFT WET AREA FLOOR INTERCOSTAL UPPER SURFACE AROUND FASTENER HOLES CORROSION BS 949-960, LBL 48-50. GROUNDED - YES. BLENDED INTERCOSTAL P/N 147A5660Y21 IN MAIN CABIN AFT WET AREA BS 949-960 LBL 48-50 BEYOND SERVICEABLE LIMITS IAW B-737-800 SRM 53-70-51, REMOVED INTERCOSTAL IAW B737-800 SRM 51-40-02, LOCATED, DRILLED AND COUNTERSUNK IAW BAC DWG 147A5660 REV A, INSTALLED NUT PLATES AND DOME NUTS IAW B-737-800 SRM 51-40-02, INSTALLED INTERCOSTAL IAW B-737-800 SRM 51-40-02 REMOVED DOT.