What was found
LOWER FUSELAGE CENTER WING VERTICAL BULKHEAD VAPOR BARRIER HAS SMALL CRACK @ RBL-15 ;I/B OF R/H A/C AIR EXIT EXHAUST CUTOUT MKD DOT / [01] MEASUREMENTS;[02] CLEANED DAMAGE AREA OF VAPOR BARRIER FOR REPAIR; STOP DRILL CRACK; AND PERFORMED DRY OUT ;FOUND NO WATER AS PER B737 SRM 51-70-04-2R-10;[03] VERIFIED CLEAN; STOP DRILL AND DRY OUT.<BR>OK TO INSTALL REPAIR;[04] REPAIRED SMALL CRACK SIZE 4' WITH A PERMANENT REPAIR ON LOWER FUSELAGE CENTER WING VERTICAL BULKHEAD VAPOR BARRIER AT RBL15' ;I/B OF R/H A/C AIR EXHAUST CUT OUT AS PER B737 SRM 51-70-04-2R-10. MATERIALS USED PO#1690463 AND PO#1753794;[05] PERFORMED TAP TEST ON REPAIRED AREA; FOUND NO DELAMINATION AS PER B737 NDT 51-05-01-SECTION 5;[06] ADDITION TO STEP 4 ALSO USED AS REFERENCE SRM 57-10-10-2R-2;[07] VERIFIED 4-6.