# SDR USAA051270

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 31, 2005
- Submitted: November 1, 2005
- Operation: Air carrier
- Aircraft: N779AU
- Make and model: Boeing 737-4B7
- Registry model: [Boeing 737-4B7](https://openairdocs.org/model/boeing-737-4b7) (OpenAirDocs)
- Aircraft serial: 24996
- Aircraft time: 41,009 hours, 41,009 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Structure
- Condition: Cracked
- Location: Between Bs 380 A
- 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/USAA051270

## Discrepancy

UPPER CHORD CORRODED BETWEEN BS 380 AND BS400 AT BL0.  REMOVED AND REPLACED UPPER CHORD IAW SRM 51-10-02 BOEING DWG 69-35365, DEFECT SIZE: 1.5".

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