# SDR 2011F00141

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 19, 2010
- Submitted: June 13, 2011
- Operation: General aviation
- Aircraft: [N42ML](https://openairdocs.org/aircraft/N42ML), registered now
- Make and model: Cessna 421C
- Registry model: [Cessna 421C](https://openairdocs.org/model/cessna-421c) (OpenAirDocs)
- Aircraft serial: 421C0523
- Aircraft time: 2,675 hours
- Engine: Cont GTSIO520L
- Engine time: 593 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Journal
- Condition: Mismanufactured
- Location: Cam
- Part time: 593 hours
- Stage of operation: AA
- How discovered: V
- Nature of condition: E
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2011F00141

## Discrepancy

ENGINE DEVELOPED A VIBRATION.  UPON REMOVAL AND TEARDOWN, IT WAS DISCOVERED THAT THE CAM JOURNALS WERE MISSING THE NECESSARY LUBRICATION CHANNELS. IT IS THE OPINION OF REPAIR STATION+ THAT THE HOLES WERE FILLED WITH A .1875" SOLID MATERIAL CONSISTENT WITH THE ADJACENT STRUCTURE AND WAS NOT SHAVING OR METAL PARTICLES FROM THE ENGINE.

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