What was found
THE BS 1183 BULKHEAD WEB WAS FOUND CRACKED IN TWO LOCATIONS AT RBL 18. THERE IS A 1 INCH CRACK AT WL 166.3 TO WL 167.5 AND A .1875 INCH CRACK AT WL 169. THE WEB IS A BONDED ASSEMBLY OF 2024-T3 CLAD WITH A LOCAL THICKNESS OF 0.050 INCH. THE CRACK LOCATIONS ARE OUTSIDE OF THE INSPECTION AREA SPECIFIED BY BOEING SERVICE BULLETIN 727-53-171. MTC REPORTS THAT THE VERTICAL STIFFENER AT RBL 18, THE TOPIC OF BOEING SB 727-53-0202, IS NOT DAMAGED. THE CRACKS WILL BE STOP DRILLED AND A REPAIR DOUBLER INSTALLED PER DL ERA 302880-14.