What was found
AFT CARGO AT STR 29L BTW STA 1212 AND 1231 INTERCOSTAL O/B SIDE HAS CORROSION. CORROSION DAMAGE ON AFT CARGO INTERCOSTAL AT LONGERON 29LT BETWEEN STA 1212 AND 1231 FOUND OUT OF LIMITS DUE TO 100% MAT LOSS, ORIG THICKNESS .050" IAW SRM 53-01 FIG 1 AND DRAWING 5936071 REV W. REMOVED, FABRICATED NEW, AND INSTALLED NEW INTERCOSTAL IAW SRM 51-30-2 AND DRAWING#5936071 REV W.