# SDR USAA2012061900015

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 3, 2012
- Submitted: June 20, 2012
- Operation: Air carrier
- Aircraft: N424US
- Make and model: Boeing 737401
- Aircraft serial: 23991
- Aircraft time: 62,000 hours, 40,830 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Stiffener
- Part number: 6546579513
- 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/USAA2012061900015

## Discrepancy

Q4 CHECK - CORROSION ON STIFFENER AT BS 1120, S15R.  REPLACED STIFFENER AT BS 1120, S15R IAW B737-400 DRAWING 65-46579.

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