What was found
AFT CARGO INTERCOSTAL HAS CORROSION ON LOWER OUTBOARD SIDE AT RBL-5 STA 1417. REMOVED INTERCOSTAL AT AFT CARGO STA 1417 RBL 5 AND EVALUATED AND FOUND OUT OF LIMITS, IAW B757 SRM 51-40-02-0G AND B757 SRM 53-00-04-1A FIG 101 DET V. REPLACED INTERCOSTAL BY FABRICATION, IAW B757 SRM 51-30-01-0G FIG 2 NOTE G, 51-40-02-0G AND BOEING DWG 146N5399 REV B. AT AFT CARGO BETWEEN STA 1400 TO 1420 RBL 5.