# SDR SWAA2021092004266

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 6, 2021
- Submitted: September 20, 2021
- Operation: Air carrier
- Aircraft: [N410WN](https://openairdocs.org/aircraft/N410WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 27897
- Aircraft time: 66,797 hours, 39,221 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Web
- Condition: Cracked
- Location: Bs 277-294 Bl0
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2021092004266

## Discrepancy

CRACK WEB - INTERCOSTAL FLOOR STRUCTURE LOCATED BETWEEN BSTA 277 AND BSTA 294.5; BLO 0 FWD GALLEY AND LAV ; 2021-373093 / [01] REMOVED WEB - INTERCOSTAL FLOOR STRUCTURE LOCATED BETWEEN BS 277 AND BS 294.5; BLO 0 FWD GALLEY AND LAV I.A.W. B737-700 SRM 51-40-02. PERFORMED VISUAL INSPECTION ON AREA AND NOT FOUND MORE DAMAGE. EVALUATED WEB-INTERCOSTAL FOR CRACK AND NOT FOUND ALLOWABLE DAMAGE ON SRM. WEB-INTERCOSTAL MUST BE REPLACED. MEASURE CRACK IS L: 0.280 TOOL USED CALIPER P/N: 500-752-20; S/N: B21037208; DUE DATE: 11-AUG-22; [02] STEP 1 COMPLETED; [03] PERFORMED DRILL AND APPLIED PROTECTIVE TREATMENT ON NEW HOLES WEB - INTERCOSTAL FLOOR STRUCTURE LOCATED BETWEEN BS 277 AND BS 294.5; BLO 0 FWD GALLEY AND LAV I.A.W. B737-700 SRM 51-40-05 AND SRM 51-20-01.; [04] RII; STEP 3 COMPLETED.; [05] OK TO INSTALL WEB - INTERCOSTAL AND FASTENERS LOC. ON FLOOR STRUCTURE LOCATED BETWEEN BS 277 AND BS 294.5; BLO 0 FWD GALLEY AND LAV; [06] RII; STEP 5 COMPLETED. <BR>OK2INS GRANTED.; [07] INSTALLED WEB - INTERCOSTAL AND FASTENERS LOC. ON FLOOR STRUCTURE LOCATED BETWEEN BS 277 AND BS 294.5; BLO 0 FWD GALLEY AND LAV I.A.W B737-700 SRM 51-40-02 AND DWG 141A5400; SHEET 20; REV -; [08] STEP 7 COMPLETED. RII; [09] REPLACED WEB - INTERCOSTAL AND FASTENERS LOC. ON FLOOR STRUCTURE LOCATED BETWEEN BS 277 AND BS 294.5; BLO 0 FWD GALLEY AND LAV I.A.W B737-700 SRM 51-40-02 AND DWG 141A5400; SHEET 20; REV -; [10] CERTIFIED STEP 9<BR>RII VERIFIED

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