# SDR USAA2012010500019

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 22, 2011
- Submitted: January 5, 2012
- Operation: Air carrier
- Aircraft: N426US
- Make and model: Boeing 737-4B7
- Registry model: [Boeing 737-4B7](https://openairdocs.org/model/boeing-737-4b7) (OpenAirDocs)
- Aircraft serial: 24548
- Aircraft time: 59,768 hours, 40,074 cycles
- System (JASC): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- Part number: 69366832
- Condition: Corroded
- Location: Fuselage
- 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/USAA2012010500019

## Discrepancy

Q6 CHECK - LEVEL 2 INTERGRANULAR CORROSION ON AFT CARGO FLOORBEAM AT BS 751, RBL 3. REPLACED AFT CARGO FLOORBEAM AT BS 751, RBL 3 IAW B737 SRM 51-10-02.

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