# SDR N3XR20201209002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 8, 2020
- Submitted: December 9, 2020
- Operation: General aviation
- Filed by: [Embry-Riddle Aeronautical University Inc, repair station N3XR816N](https://openairdocs.org/faa-repair-station/N3XR816N/embry-riddle-aeronautical-university-inc.md) (OpenAirDocs)
- Aircraft: N638ER
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Aircraft serial: 172S11464
- Aircraft time: 5,218 hours
- Engine: Lyc IO360L2A
- Engine time: 10,338 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Valve
- Part number: LW12427
- Condition: Stuck
- Location: Nr 2 Cylinder
- Part time: 10,338 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: R
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/N3XR20201209002

## Discrepancy

DURING FLIGHT, THE CREW EXPERIENCED A POWER LOSS AND SIGNIFICANT ENGINE VIBRATION.  THEY EXECUTED A LANDING AT THE NEAREST AIRPORT.  INSPECTION REVEALED THE NR 2 CYLINDER EXHAUST VALVE WAS STICKING.  NO OTHER DAMAGE WAS FOUND.

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