# SDR 2017FA0000364

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 17, 2017
- Submitted: August 8, 2017
- Operation: General aviation
- Aircraft: N6794D
- Make and model: Cessna 421C
- Registry model: [Cessna 421C](https://openairdocs.org/model/cessna-421c) (OpenAirDocs)
- Aircraft serial: 421C1030
- Engine: Cont GTSIO520L
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Lifter
- Part number: 658088
- Condition: Spalled
- Location: Engine
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2017FA0000364

## Discrepancy

BOTTOM SURFACE OF LIFTERS SPALLING CAUSING DAMAGE TO CAMSHAFT.

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