What was found
MAIN CABIN AFT WET AREA R/H SIDE AREA, INTERCOSTAL HAS 2 EACH WEAR MARKS AT THE UPPER FLANGE LOWER SURFACE BETWEEN BS 1006 AND BS 1016 APPROX. RBL-17. MARKED GROUNDED - YES. REMOVED DAMAGE, ORIGINAL THICKNESS 0.063. REMOVED 0.008 REMAINING THICKNESS 0.055. FOUND TO BE OUT OF LIMITS IAW B737-800 SRM 53-70-51-1A-1 DETAIL C T8224K CAL DUE 17OCT2023. REMOVED AND REPLACED INTERCOSTAL P/N 147A5110U4 PO:1055386.1 IAW BAC DWG 147A5700 REV B AND B737-800 SRM 51-40-02