# SDR SWAA2026062203777

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 16, 2026
- Submitted: June 23, 2026
- Operation: Air carrier
- Aircraft: [N8646B](https://openairdocs.org/aircraft/N8646B), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 36935
- Aircraft time: 39,772 hours, 19,344 cycles
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Doubler
- Condition: Corroded
- 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/SWAA2026062203777

## Discrepancy

BS 727, BL 0,  EXTERNAL SKIN AT PRESSURE DRAIN VALVE WAS CORRODED AT RIVETS.  REMOVED AND REPLACED PRESSURE DRAIN VALVE DOUBLER BS 727, BL 0, WL 148 IAW SRM 51-40-02, AND DWG 146A3230 REV -.

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