# SDR 99ZZZX4223

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 8, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Filed by: [Embry Riddle Aeronautical University Inc, repair station BF8R032O](https://openairdocs.org/faa-repair-station/BF8R032O/embry-riddle-aeronautical-university-inc.md) (OpenAirDocs)
- Aircraft: N478ER
- Make and model: Cessna 172R
- Registry model: [Cessna 172R](https://openairdocs.org/model/cessna-172r) (OpenAirDocs)
- Aircraft serial: 17280623
- Engine: Lyc IO360L2A
- System (JASC): [8500 · Engine (Reciprocating)](https://openairdocs.org/jasc/8500)
- Part: Engine
- Condition: Malfunctioned
- Location: Forward
- Part time: 1,022 hours
- Stage of operation: CR
- Nature of condition: E, R, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX4223

## Discrepancy

DURING NORMAL CRUISE OPERATIONS, THE ENGINE EXPERIENCED MOMENTARY ROUGHNESS.  THE ENGINE WAS THOROUGHLY INSPECTED AND NO SUSPECT ITEMS WERE FOUND.

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