# SDR 2012FA0000643

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 17, 2012
- Submitted: September 21, 2012
- Operation: General aviation
- Make and model: Rkwell NA26560
- Aircraft serial: 306070
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Stiffener
- Part number: 26531204451
- Condition: Cracked
- 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/2012FA0000643

## Discrepancy

WHILE PERFORMING A ROUTINE INSPECTION,  FOUND A CRACK IN THE LT STIFFENER.   CRACK PROPAGATED FROM A CORROSION PIT IN THE HAT SECTION STIFFENER.  REPLACED IAW SRM AND RETURNED TO SERVICE.

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