# SDR SWAA2026091030945

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 6, 2026
- Submitted: September 11, 2026
- Operation: Air carrier
- Aircraft: [N931WN](https://openairdocs.org/aircraft/N931WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36637
- Aircraft time: 56,214 hours, 34,452 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Intercostal
- Condition: Corroded
- Location: Zone 200
- 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/SWAA2026091030945

## Discrepancy

CORROSION FOUND ON TOP AFT (WET AREA) FLOOR STRUCTURE AT LBL 32 BS 996 WL 208.   EVALUATED CORROSION ON BS986-BS1006 LBL34 WL208 INTERCOSTAL AT BS 996 LBL32 WL208 ORIGINAL MATERIAL THICKNESS IS 0.080" LOWEST REMAINING MATERIAL IS 0.056",  DAMAGE FOUND TO BE OUT LIMIT REMOVE LOCATED AND DRILLED PART TO BE INSTALLED ON CCN TTG8Q01DKS4G STEP 18

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