# SDR 2012FA0000596

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 24, 2012
- Submitted: August 25, 2012
- Operation: General aviation
- Aircraft: [N678DB](https://openairdocs.org/aircraft/N678DB), registered now
- Make and model: Cessna 421B
- Registry model: [Cessna 421B](https://openairdocs.org/model/cessna-421b) (OpenAirDocs)
- Aircraft serial: 421B0876
- Aircraft time: 5,167 hours
- Engine: Cont GTSIO520C
- Engine time: 1,451 hours
- System (JASC): [8120 · Exhaust Turbocharger](https://openairdocs.org/jasc/8120)
- Part: Clamp
- Part number: NH100089750
- Condition: Cracked
- Location: Turbocharger
- Part time: 1,451 hours
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2012FA0000596

## Discrepancy

TURBOCHARGER TURBINE TO TAILPIPE V BAND CLAMP, FOUND TO HAVE A 3" LONG CRACK ALONG THE OUTER PERIMETER OF THE V BAND.  CRACK SEPARATION WAS LESS THAN .0625" AT THE WIDEST POINT.  THIS IS NOT A MULTI-SEGMENT V BAND.  NO EXHAUST LEAK EVIDENT.  DISCOVERED DURING COMPLIANCE WITH AD 2000-01-16 PARAGRAPH (G) INSPECTION.

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