# SDR USAA2011092900015

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 29, 2011
- Submitted: October 13, 2011
- Operation: Air carrier
- Aircraft: [N438US](https://openairdocs.org/aircraft/N438US), registered now
- Make and model: Boeing 737-4B7
- Registry model: [Boeing 737-4B7](https://openairdocs.org/model/boeing-737-4b7) (OpenAirDocs)
- Aircraft serial: 24560
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Buttstrap
- Condition: Corroded
- Location: Bs 907
- 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/USAA2011092900015

## Discrepancy

DURING LAV SPILL CLEAN-UP, CORROSION WAS FOUND ON THE BUTT STRAP AT BS 907 & ALONG SEVERAL AREAS OF S20R TO S23R.  REPLACED STRINGER SPLICES IAW SRM 53-03-03-2R1, 51-40-02 & DWG 65-45778.

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