# SDR USAA020301

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 20, 2002
- Submitted: September 11, 2002
- Operation: Air carrier
- Aircraft: N389US
- Make and model: Boeing 737-3B7
- Registry model: [Boeing 737-3B7](https://openairdocs.org/model/boeing-737-3b7) (OpenAirDocs)
- Aircraft serial: 23311
- System (JASC): [5314 · Fuselage Main, Keel](https://openairdocs.org/jasc/5314)
- Part: Keelbeam
- Condition: Corroded
- Location: Fuselage
- Part time: 48,430 hours
- 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/USAA020301

## Discrepancy

PIT - FOUND KEEL BEAM CORRODED, 3-4 INCHES, EXFOLIATION THROUGH BEAM S-28R AT STATION 540.  CORROSION LEVEL 2, TASK NR C53-208-01.  REPLACED KEEL BEAM SECTION PER EA 74111.  (M)

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