# SDR EE4Y2018030406051

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 8, 2018
- Submitted: March 4, 2018
- Operation: Air carrier
- Filed by: [Cooperativa Autogestionaria de Servicios Aeroindus, repair station EE4Y151M](https://openairdocs.org/faa-repair-station/EE4Y151M/cooperativa-autogestionaria-de-servicios-aeroindus.md) (OpenAirDocs)
- Aircraft: [N307GT](https://openairdocs.org/aircraft/N307GT), registered now
- Make and model: Boeing 737-4H6
- Registry model: [Boeing 737-4H6](https://openairdocs.org/model/boeing-737-4h6) (OpenAirDocs)
- Aircraft serial: 26455
- Aircraft time: 48,070 hours, 39,294 cycles
- System (JASC): [5711 · Wing Spar](https://openairdocs.org/jasc/5711)
- Part: Spar
- Condition: Corroded
- Location: Lt Wing
- 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/EE4Y2018030406051

## Discrepancy

DURING THE MAINTENANCE INSPECTION, IT WAS FOUND AT THE LT WING L/E CAVITY, THE FRONT SPAR LOWER CHORD FLANGE WITH CORROSION AT WS 583, THE REPAIR WAS CARRIED OUT IAW INSTRUCTIONS AND APPROVED UNDER DOCUMENT COO-SOF-18-0006-04B(R1).

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