# SDR SWAA2025121647502

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 20, 2025
- Submitted: December 16, 2025
- Operation: Air carrier
- Aircraft: [N452WN](https://openairdocs.org/aircraft/N452WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29846
- Aircraft time: 71,355 hours, 42,914 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Stiffener
- Condition: Cracked
- Location: Zone 100
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2025121647502

## Discrepancy

CENTER TANK RIB CRACKED AT BS 540, LBL 25, WL 202.  REPLACED VERTICAL STIFFENER RIB AND FASTENER LOCATED  IAW SRM 51-40-02,  SRM 51-10-02, ITEM 9, DWG 111A2001, SHEET 77, REV-, & DWG 111A6000, SHEET 301, REV-.

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