# SDR 99ZZZX595

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 7, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N12455
- Make and model: Cessna 414A
- Registry model: [Cessna 414A](https://openairdocs.org/model/cessna-414a) (OpenAirDocs)
- Aircraft serial: 414A1207
- Engine: Cont TSIO550A
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Piston
- Part number: 649805
- Condition: Cracked
- Location: Nr 4 Cylinder
- Stage of operation: NR
- Nature of condition: E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX595

## Discrepancy

DURING FLIGHT, THE RIGHT ENGINE BEGAN TO RUN ROUGH AND LOST OIL PRESSURE.  THE PILOT SECURED THE ENGINE AND MADE A SAFE SINGLE-ENGINE LANDING.  AN INVESTIGATION REVEALED A CRACK IN THE PISTON.  THIS CRACK STARTED FROM THE OIL CONTROL RING LANDING THROUGH THE CENTER OF THE PISTON AND A HOLE WAS NOTED IN THE TOP OF THE PISTON.  NO OVERHEATING OR ABNORMAL WEAR WAS NOTED.  SUBMITTER STATED CAUSE UNKNOWN.

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