# SDR USAA040355

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 20, 2004
- Submitted: August 20, 2004
- 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
- System (JASC): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- Condition: Corroded
- Location: Fuselage
- Part time: 41,553 hours
- 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/USAA040355

## Discrepancy

PIT - FOUND FLOORBEAM CORRODED .5 INCH BY .100 INCH, CABIN FLOORBEAM FS 967 RBL UPPER AFT BEAM EDGE.  BLENDED CORRODED AREA, TREATED AND PRIMED PER SRM 53-60-51 FIG 101 DETAIL XV.  CORROSION LEVEL 1, TASK C53-107-02.  (M)

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