What was found
***CORROSION*** ON FORWARD CARGO BAY SUB WEB THRESHOLD AT B.S. 440-494, R.B.L. 28, W.L. 155. REMOVED CORROSION ON FCB SUBTHRESHOLD WEB BS 440-494, AREAS 4.3" X 2". 1." X 0.7" AND 1.2" X 1", ORIGINAL THICKNESS 0.045", LOWEST REMAINING THICKNESS 0.040" FOUND TO BE OUT OF LIMITS IAW SRM 53-30-15-1A-1. REMOVED AND REPLACED FCB SUBTHRESHOLD WEB P/N 7530597 PO# 763003, BS 440-494 IAW SRM 51-40-02 REF DWG 143A8330 REV A. 89004U, 03MAR20.