What was found
FORWARD CARGO BAY CORROSION ON INTERCOSTAL UNDER LEFT CARGO FLOOR Z CHANNEL STA 500F-500G LBL 25 WL 160 NEAR SCREW HOLES, MARKED. CORROSION ON FWD CARGO BAY INTERCOSTAL UNDER LEFT CARGO FLOOR Z-CHANNEL STA 500E TO 500G LBL 25 WL 160 FOUND TO BE OUT OF LIMITS, DUE TO FASTENER HOLE'S LOCATION, IAW SRM 53-00-53-1A-2 FIG 103 DETAIL (D). REMOVED INTERCOSTAL, IAW SRM 51-40-02-0G-0. INSTALLED NEW INTERCOSTAL NR 802535/6 AND REAIR PART LOT NR 5088298-1, IAW SRM 51-40-02-0G-0, SRM 53-30-53-2R-1 AND BOEING DWG 143A7505 REV B.