# SDR SWAA2025033104420

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 12, 2025
- Submitted: March 31, 2025
- Operation: Air carrier
- Aircraft: [N435WN](https://openairdocs.org/aircraft/N435WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 32455
- Aircraft time: 72,183 hours, 43,264 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Stiffener
- Condition: Corroded
- Location: Zone 200
- 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/SWAA2025033104420

## Discrepancy

CORROSION ON PRESSURE DECK STIFFENER AT STA 708+2; FROM LBL 62 TO 70; WL 200.<[01] FABRICATED A NEW STIFFENER FROM 7075-T0 0.071' LOT 1523843-1 IAW SRM 51-30-01 AND DWG 144A7713 REV: B. REMOVED AND REPLACED THE CORROEDED STIFFENER ON PRESSURE DECK WITH THE STIFFENER AT STA 708+2; FROM LBL 62 TO 70; WL 200. IAW SRM 51-40-02.;[02] CORRECTIVE RII ACTION ITEM 1 VERIFIED; CARD COMPLETE.

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