What was found
AFT CARGO COMPARTMENT FLOOR TRACK STA 927 TO 947 LBL 3 HAS CORROSION AT NUTPLATE HOLES. / EVALUATED TRACK ASSY AFT CARGO STA 887 - 947. 100% MATERIAL LOSS ON TRACK ASSY. FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2. ORIGINAL THICKNESS .071'; REMAINING .000'. REMOVED TRACK ASSY AFT CARGO STA 887 - 947 LBL 3 IAW SRM 51-40-02. VERIFIED NEW TRACK ASSY AFT CARGO STA 887 - 947 LBL 3 P/N - 147A7501U13 ON ATAG # WN8780 IAW BOEING DWG # 147A7801 REV B. LOCATED AND DRILLED NEW TRACK ASSY AFT CARGO STA 887 - 947 LBL 3 IAW SRM 51-40-05 AND BOEING DWG # 147A7501 REV B. INSTALLED NEW TRACK ASSY AFT CARGO STA 887 - 947 LBL 3 IAW SRM 51-40-02 AND BOEING DWG # 147A7501 REV B.