# SDR USAA2013080200007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 31, 2013
- Submitted: August 2, 2013
- Operation: Air carrier
- Aircraft: N409US
- Make and model: Boeing 737401
- Aircraft serial: 23879
- Aircraft time: 67,741 hours, 45,358 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Sill
- Part number: 6547967U11
- Condition: Corroded
- Location: Zone 100
- 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/USAA2013080200007

## Discrepancy

C3 CHECK - CORROSION FOUND ON SILL PLATE STRAP BETWEEN BS 793 TO 847, RBL 17.  REPLACED SILL IAW SRM 51-40-02 & 51-10-02.

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