# SDR SWAA2021011140557

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 7, 2021
- Submitted: January 28, 2021
- Operation: Air carrier
- Aircraft: N406WN
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 27894
- Aircraft time: 66,898 hours, 39,718 cycles
- System (JASC): [5531 · Vertical Stabilizer, Spar/Rib](https://openairdocs.org/jasc/5531)
- Part: Rib
- Condition: Cracked
- Location: Vertical Stab
- 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/SWAA2021011140557

## Discrepancy

CRACK DORSAL FIN RIB BST 867 AT VERTICAL STABILIZER / REPLACED RIB ON DORSAL FIN BS867 AT VERTICAL STABILIZER IAW B737-700 SRM 51-10-02 ITEM 9 AND SRM 51-40-02 DRAWING # 174A0103 REV A

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