# SDR USAA051290

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 1, 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): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- Condition: Corroded
- Location: Bs 328
- 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/USAA051290

## Discrepancy

FOUND FLOORBEAM CORRODED AT 328, CORROSION AROUND CLIP NUT HOLES RBL 10 TO Z-ANGLE AT FWD SER.  CLEANED CORROSION ALODINED AND PRIMED EXCEPT RBL 21 (OUT OF SRM LIMITS) IAW SRM 51-10-51, TR53-15-01B, DEFECT SIZE: .500 DIA CORRODED AREAS.

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