# SDR SWAA2021042858885

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 25, 2021
- Submitted: April 28, 2021
- Operation: Air carrier
- Aircraft: [N443WN](https://openairdocs.org/aircraft/N443WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29838
- Aircraft time: 60,053 hours, 35,289 cycles
- System (JASC): [5511 · Horizontal Stabilizer, Spar/Rib](https://openairdocs.org/jasc/5511)
- Part: Rib
- Condition: Cracked
- Location: Horizontal 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/SWAA2021042858885

## Discrepancy

CRACK LEADING EDGE RIB Ï¿½ 9 AT RT HORIZONTAL STABILIZER / REPLACED RIB 9 LEADING EDGE AT RT HORIZONTAL STABILIZER DRILLED NEW RIB IAW SRM B737-700 51-40-02; 51-10-02; 51-40-05 DWG 186A1001 REV D REPLACED RIB DUE TO NOT FOUND ALLOWABLE DAMAGE IN SRM B737-700

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