What was found
CORROSION ON INTERCOSTAL WEB AT 2 EA FASTENER HOLES LOWER SURFACE AFT CARGO PIT BETWEEN STA 747 TO STA 767 RBL 23, W/L 156. INTERCOSTAL WEB HOLES LOWER SIDE CORROSION BETWEEN STA 747 TO STA 767. BLENDED AND REMOVED CORROSION, IAW SRM 53-00-04-1A-1 STEP 2D(1), (2), (3). 'OUT OF LIMITS' MATERIAL THICKNESS IS .032. MATERIAL REMOVED .005 MATERIAL REMAINING .027, IAW SRM 53-00-04-1A-1 FIG 102- DETAIL I. LOCATED DRILLED NEW INTERCOSTAL, IAW SRM 51-40-05-0G-0 ALSO BEING DWG 146A7502 REV B. INSTALLED NEW INTERCOSTAL, IAW SRM 51-40-02-0G-0 AND ALSO BOEING DWG 146A7502 REV B.