What was found
MAIN CABIN FLOOR SUPPORT INTERCOSTAL HAS TOOLING MARKS ON UPPER RH SIDE AT APPROX STA 584, BL-0. REMOVED AND REPLACED MAIN CABIN FLOOR SUPPORT INTERCOSTAL WEB, STA 584, BL-0 IAW B757SRM 51-40-02-0G AND VT MAE DWG 1182110, REV. -, P/N 11864112-2 FABRICATED ON N00510.