What was found
CORROSION RT Z-CHANNEL IN AFT CARGO BAY HAS MULTIPLE AREAS OF CORROSION FROM STA 727-767, RBL21 AND WL 158. CORROSION ON RT Z-CHANNEL IN AFT CARGO BAY FROM STA 727 - 767, RBL 21 AND WL 158 FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2 FIG 103 DETAIL D. FABRICATED Z-CHANNEL FROM BAC1496-377 7075-T62 PN 786416/1. INSTALLED Z-CHANNEL FROM BS 727 TO 767, RBL 21 AND WL 158 IAW SRM 51-40-02-0G-0 AND DWGS 146A7500 REV AND 146A7502 REV. SPLICE LOCATION IS AT BS 727E+12'.