# SDR USAA2012072300036

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 25, 2012
- Submitted: July 23, 2012
- Operation: Air carrier
- Aircraft: [N433US](https://openairdocs.org/aircraft/N433US), registered now
- Make and model: Boeing 737-4B7
- Registry model: [Boeing 737-4B7](https://openairdocs.org/model/boeing-737-4b7) (OpenAirDocs)
- Aircraft serial: 24555
- Aircraft time: 60,359 hours, 40,225 cycles
- System (JASC): [5313 · Fuselage Main, Longeron/Stringer](https://openairdocs.org/jasc/5313)
- Part: Stringer
- 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/USAA2012072300036

## Discrepancy

Q1 CHECK - LEVEL 2 EXFOLIATION CORROSION ON STRINGER BETWEEN BS 947.5 TO BS 955 S27L.  REPAIRED STRINGER BETWEEN BS 947.5 TO BS 955 S27L IAW B737-400 SRM 53-00-03-2R-1, FIG 201, DETAIL VI.

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