# SDR 2012FA0000810

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 21, 2012
- Submitted: December 10, 2012
- Operation: General aviation
- Aircraft: [N2668A](https://openairdocs.org/aircraft/N2668A), registered now
- Make and model: Cessna 421C
- Registry model: [Cessna 421C](https://openairdocs.org/model/cessna-421c) (OpenAirDocs)
- Aircraft serial: 421C1216
- Aircraft time: 6,251 hours
- Engine: Cont GTSIO520N
- Engine time: 2,876 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Condition: Detached
- Location: Nr 5
- Part time: 1,129 hours
- Stage of operation: CL
- How discovered: O
- Nature of condition: D, R
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2012FA0000810

## Discrepancy

NR 5 CYLINDER UPPER BASE STUDS FAILED - THREE BLIND STUDS & 1 CASE THROUGH-STUD.   CYLINDER PARTIALLY DISLODGED FROM CRANKCASE, LOSS OF ENGINE OIL, SIGNIFICANT VIBRATION, PRECAUTIONARY IN-FLIGHT SHUTDOWN AND FEATHER.

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