# SDR USAA061249

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 23, 2006
- Submitted: October 24, 2006
- Operation: Air carrier
- Aircraft: N406US
- Make and model: Boeing 737401
- Aircraft serial: 23876
- Aircraft time: 50,675 hours, 50,675 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Stiffener
- Condition: Cracked
- Location: Bs 328
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA061249

## Discrepancy

FOUND CRACK, BS 328 LBL 45 TOP RADIUS OF VERTICAL STIFFENERS.  FABRICATED AND INSTALLED NEW ANGLE IAW SRM 51-30-01, DEFECT SIZE: 1.5" AND 1.25".

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