# SDR SWAA2021070176732

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 24, 2021
- Submitted: July 1, 2021
- Operation: Air carrier
- Aircraft: [N942WN](https://openairdocs.org/aircraft/N942WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36648
- Aircraft time: 39,538 hours, 23,971 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Stiffener
- Condition: Cracked
- Location: Bs 540 Rbl25-45
- 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/SWAA2021070176732

## Discrepancy

CRACK STIFFENER ASSY LOCATED BS 540 BETWEEN RBL 24.75 TO RBL 45 AT CENTER WING BOX ; 2021-255119 / [01] REPLACED STIFFENER LOCATED BS 540 BTW RBL 24.75 TO RBL 45 AT CENTER WING BOX IAW SRM B737-700 51-40-02 AND SRM B737-700 51-10-02 ITEM 9; [02] VERIFIED STIFFENER REPLACEMENT. ALL STEP COMPLETED. TASK RII.

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