What was found
AAI INSPECTION. MAIN CABIN; FLOOR STRUCTURE SUPPORT HAS CRACK AT STA 540; BL 0 TO LBL 24.75. 2025-307653 <[01]. MEASURE CRACK IS 1.230 INCHES TOOL USED: ELECTRONIC CALIPER P/N: 500-196-30 S/N: A23048253 DUE DATE: 05/JUN/25. REPLACED FLOOR STRUCTURE SUPPORT (BREAK PANEL) LOCATED ON MAIN CABIN AT STA 540; BL 0 TO LBL 24.75. IAW B737-70L SRM 51-10-02 ITEM 9; SRM 51-40-02 AND DWG: 143A0060 SHEET: 46 REV -; [02] CORRECTED STEP MEASURE CRACK IS 1.230 INCHES TOOL USED: ELECTRONIC CALIPER P/N: 500-196-30 S/N: A23048253 DUE DATE: 05/JUN/25. REPLACED FLOOR STRUCTURE SUPPORT (BREAK PANEL) LOCATED ON MAIN CABIN AT STA 540; BL 0 TO LBL 24.75. IAW B737-700 SRM 51-10-02 ITEM 9; SRM 51-40-02 AND DWG: 143A0060 SHEET: 46 REV -; [03] MEASURE CRACK IS 1.230 INCHES TOOL USED: ELECTRONIC CALIPER P/N: 500-196-30 S/N: A23048253 DUE DATE: 05/JUN/25. REPLACED FLOOR STRUCTURE SUPPORT (BREAK PANEL) LOCATED ON MAIN CABIN AT STA 540; BL 0 TO LBL 24.75. IAW B737-700 SRM 51-10-02 ITEM 9; SRM 51-40-02 AND DWG: 143A0060 SHEET: 46 REV -.