# SDR USAA2013060400031

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 14, 2013
- Submitted: June 5, 2013
- Operation: Air carrier
- Aircraft: N936UW
- Make and model: Boeing 757-2B7
- Registry model: [Boeing 757-2B7](https://openairdocs.org/model/boeing-757-2b7) (OpenAirDocs)
- Aircraft serial: 27244
- Aircraft time: 61,991 hours, 24,583 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Stiffener
- Part number: 146N876933
- 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/USAA2013060400031

## Discrepancy

C4 CHECK - LEVEL 2 EXFOLIATION CORROSION ON L4 PAX/CREW DOOR CUTOUT AFT VERTICAL STIFFINER AT BS1681, S17L & LBL62.  REPLACED VERTICAL STIFFINER AT BS1681, S17L & LBL62 IAW SRM 51-40-02 & DWG 146N8769.

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