# SDR 99ZZZX2800

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 20, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N7725R](https://openairdocs.org/aircraft/N7725R), registered now
- Make and model: Beech D55
- Registry model: [Beech D55](https://openairdocs.org/model/beech-d55) (OpenAirDocs)
- Aircraft serial: TE644
- Engine: Cont IO520C
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 649166
- Condition: Broken
- Location: Engine
- Stage of operation: CR
- Nature of condition: E, R
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX2800

## Discrepancy

DURING CRUISE FLIGHT, LEFT ENGINE BEGAN TO RUN ROUGH.  PILOT FEATHERED ENGINE.  A NORMAL SINGLE ENGINE LANDING WAS MADE.  FOUND NR 3 CYLINDER BROKEN HALF WAY BETWEEN FLANGE AND BOTTOM OF HEAD.  PISTON CAME OUT AND BROKE.  CASE BROKE ALSO, STEEL CYLINDER.

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