# SDR 97ZZZX3977

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 18, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N6620Z
- Make and model: Cessna TU206G
- Registry model: [Cessna TU206G](https://openairdocs.org/model/cessna-tu206g) (OpenAirDocs)
- Aircraft serial: U20606347
- Engine: Cont TSIO520M
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Crankshaft
- Condition: Broke
- Location: Nr 4 Journal
- Part time: 2,138 hours
- Stage of operation: CR
- Nature of condition: Y, E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX3977

## Discrepancy

PILOT REPORTED A STRONG VIBRATION FOLLOWED BY A LOUD MECHANICAL BANG IN THE ENGINE DURING FLIGHT.  SECONDS LATER THE ENGINE ABRUPTLY STOPPED.  AN ENGINE 'TEAR DOWN' INSPECTION WAS PERFORMED AND REVEALED THE CRANKSHAFT BROKE AT THE NR 4 'CRANKSHAFT MAIN BEARING JOURNAL'.

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