# SDR SWAA2021061830698

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 26, 2020
- Submitted: June 18, 2021
- Operation: Air carrier
- Aircraft: [N946WN](https://openairdocs.org/aircraft/N946WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36918
- Aircraft time: 33,739 hours, 20,418 cycles
- System (JASC): [5510 · Horizontal Stabilizer Structure](https://openairdocs.org/jasc/5510)
- Part: Stiffener
- 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/SWAA2021061830698

## Discrepancy

L/H HORIZONTAL STABILIZER RIB #6 STAB STA 138.70 THE #3 STIFFENER IS CRACKED. VERIFIED CRACK AT L/H HORIZONTIAL STAB RIB #6; STAB STA.138.70 STIFFNER #3. PER BOEING NDT MANUAL PART 6; 51-00-00 PROC.23 / REPAIRED #3 STIFFENER PER SRM 55-10-09-2R-4.

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