# SDR SWAA2026010242837

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 5, 2025
- Submitted: January 2, 2026
- Operation: Air carrier
- Aircraft: [N8518R](https://openairdocs.org/aircraft/N8518R), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 63593
- Aircraft time: 29,569 hours, 14,824 cycles
- System (JASC): [5710 · Wing Main, Frame Structure](https://openairdocs.org/jasc/5710)
- Part: Tee Fitting
- Condition: Corroded
- Location: Zone 500 Le
- 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/SWAA2026010242837

## Discrepancy

LEFT-WING LEADING-EDGE STRUCTURE: LEADING EDGE 'T' EXTRUSION HAS CORROSION ON THE VERTICAL LEG. LOCATED OUTBOARD OF THE #3 SLAT ANTI-ICE TUBE. CORROSION ON T FITTING BEYOND LIMITS. REMOVED LOWER LEADING EDGE RIB T FITTING FOR REPLACEMENT.  DRILLED A REPLACEMENT EXTRUSION IAW SRM 51-40-05. INSTALLED THE TEE FITTING IAW SRM 51-40-02.

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