# SDR 2002F00038

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 17, 2002
- Submitted: January 17, 2002
- Operation: Air carrier
- Aircraft: [N763CA](https://openairdocs.org/aircraft/N763CA), registered now
- Make and model: Cessna 421C
- Registry model: [Cessna 421C](https://openairdocs.org/model/cessna-421c) (OpenAirDocs)
- Aircraft serial: 421C1019
- Engine: Cont GTSIO520N
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Piston
- Part number: 654724BP
- Condition: Failed
- Location: Engine
- Part time: 1,025 hours
- Stage of operation: CL
- How discovered: O
- Nature of condition: F
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2002F00038

## Discrepancy

TRANSISITIONING FROM TAKE-OFF TO CLIMB PHASE OF FLIGHT, AFTER REDUCING POWER NR 1 ENGINE SHUTDOWN. PILOT FEATHERED PROP AND MADE UNEVENTFUL LANDING. REMOVAL OF NR 5 CYLINDER REVEALED SEVERE DAMAGE TO THE TOP OF THE PISTON, WITH BROKEN RINGS. VALVE WERE REALITIVELY INTACT. FURTHER INSPECTION REVEALED DAMAGE TO ALL PISTONS, THOUGH NOT AS SEVERE.

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