# SDR USAA2011092100004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 13, 2011
- Submitted: September 21, 2011
- Operation: Air carrier
- Aircraft: N516AU
- Make and model: Boeing 737-3B7
- Registry model: [Boeing 737-3B7](https://openairdocs.org/model/boeing-737-3b7) (OpenAirDocs)
- Aircraft serial: 23702
- Aircraft time: 67,871 hours, 43,899 cycles
- System (JASC): [5314 · Fuselage Main, Keel](https://openairdocs.org/jasc/5314)
- Part: Keelbeam
- 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/USAA2011092100004

## Discrepancy

C5 CHECK - LEVEL 2 EXFOLIATION CORROSION ON KEEL BEAM AT BS 727+12 INCHES, S27R.  REPAIRED KEEL BEAM AT BS 727+12 INCHES, S27R IAW EA 103352.

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