# SDR USAA2012061500004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 31, 2012
- Submitted: June 15, 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: 6546579
- 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/USAA2012061500004

## Discrepancy

2S CHECK - LEVEL 2 EXFOLIATION CORROSION ON STIFFENER AT BS 1126, BETWEEN S5R TO S12R.  REPAIRED STIFFENER AT BS 1126, BETWEEN S5R TO S12R IAW BOEING DRAWING 65-46579.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.