# SDR SWAA2024120556748

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 4, 2024
- Submitted: December 5, 2024
- Operation: Air carrier
- Aircraft: [N8605E](https://openairdocs.org/aircraft/N8605E), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 36891
- Aircraft time: 39,948 hours, 18,873 cycles
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Stiffener
- Condition: Cracked
- Location: Zn 100 Fus Lower
- 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/SWAA2024120556748

## Discrepancy

CRACK STIFFENER ASSY LOCATED BS540 BETWEEN BL0 TO LBL 24.75 AT CENTER WING BOX 2024-686153<[01] REPLACED STIFFENER ASSY LOCATED BS540 BETWEEN BL0 TO LBL 24.75 AT CENTER IAW B737-800 SRM 51-40-02 AND SRM 51-10-02 ITEM 9<BR>LENGTH CRACK 0.509?<BR>TOOL USED: DIGITAL CALIPER <BR>PN: 500-197-30<BR>N:B24000968<BR>DUE DATE: 06-JUN-25;[02] REPLACED STIFFENER ASSY DUE TO NOT FOUND ALLOWABLE DAMAGE IN SRM B737-800 LOCATED BS540 BETWEEN BL0 TO LBL 24.75 AT CENTER IAW B737-800 SRM 51-40-02 AND SRM 51-10-02 ITEM 9<BR>LENGTH CRACK 0.509?<BR>TOOL USED: DIGITAL CALIPER<BR>PN: 500-197-30<BR>N:B24000968<BR>DUE DATE: 06-JUN-25;[03] REPLACED STIFFENER ASSY DUE TO NOT FOUND ALLOWABLE DAMAGE IN SRM B737-800 LOCATED BS540 BETWEEN BL0 TO LBL 24.75 AT CENTER IAW B737-800 SRM 51-40-02 AND SRM 51-10-02 ITEM 9<BR>LENGTH CRACK 0.509?<BR>TOOL USED: DIGITAL CALIPER<BR>PN: 500-197-30<BR>N:B24000968<BR>DUE DATE: 06-JUN-25

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