# SDR CA121112005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 7, 2012
- Submitted: September 14, 2015
- Operation: General aviation
- Make and model: Cessna 414
- Registry model: [Cessna 414](https://openairdocs.org/model/cessna-414) (OpenAirDocs)
- Engine: Cont TSIO520NB
- Propeller: Hartzl PHCC3YF2
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: AEC631397
- Condition: Cracked
- Location: Nr 4
- Part time: 1,124 hours
- 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/CA121112005

## Discrepancy

(CAN) DURING TROUBLESHOOTING, DIFFERENTIAL COMPRESSION TEST AND CYLINDER LEAKAGE TEST, FOUND CYLINDER LEAKING AIR FROM AREA OF COOLING FINS ON THE EXHAUST PORT. BOROSCOPE INSPECTION FOUND INTERNAL CRACK IN THE HEAD OF THE CYLINDER.

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