# SDR HLF2013F00000

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 29, 2013
- Submitted: April 12, 2013
- Operation: Air carrier
- Aircraft: [N421DS](https://openairdocs.org/aircraft/N421DS), registered now
- Make and model: Cessna 421C
- Registry model: [Cessna 421C](https://openairdocs.org/model/cessna-421c) (OpenAirDocs)
- Aircraft serial: 421C0169
- Engine: Cont GTSIO520*
- Propeller: Mcauly 3FF32C501
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part serial: 234232R
- Condition: Separated
- Location: Engine
- Part time: 4,668 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: E
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HLF2013F00000

## Discrepancy

DURING FLIGHT, ENGINE HAD A SMALL VIBRATION, FOLLOWED BY A LOUD NOISE, PILOT SHUT ENGINE DOWN AND SAFETY LANDED.  INITIAL INSPECTION SHOWED RT ENGINE NR 5 CYLINDER SEPARATION FROM CASE BY SHEARING ALL FLANGE BOLTS, CYLINDER DAMAGED RT SIDE ENGINE ACCESSORIES FUEL INJECTION LINES, EXHAUST ASSY AND RT SIDE COWLING AND TOP COWLING.  A DETAILED INSPECTION WILL BE CONDUCTED.

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