# SDR 2003FA0000442

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 30, 2003
- Submitted: April 30, 2003
- Operation: General aviation
- Aircraft: [N477ER](https://openairdocs.org/aircraft/N477ER), registered now
- Make and model: Cessna 172R
- Registry model: [Cessna 172R](https://openairdocs.org/model/cessna-172r) (OpenAirDocs)
- Aircraft serial: 17280622
- Aircraft time: 4,046 hours
- Engine: Lyc IO360L2A
- Engine time: 3,577 hours
- System (JASC): [7421 · Spark Plug/Igniter](https://openairdocs.org/jasc/7421)
- Part: Spark Plug
- Condition: Fouled
- Location: Engine
- Stage of operation: CL
- 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/2003FA0000442

## Discrepancy

THE CREW REPORTED THE ENGINE (COUGHED) ON TAKE OFF. COMPLETED AN INSPECTION ON SUSPECT ITEMS. CLEANED, TESTED AND FLOW TESTED ALL NOZZLES, CLEANED AND TESTED SPARK PLUGS. SEVERAL WERE FOUND MARGINALLY FOULED. THIS ENGINE/FUEL CONTROL COMBINATION DOES REQUIRE SUBSTANTIAL ADJUSTMENT TO MAINTAIN PROPER IDLE SPEED/MIXTURE SETTINGS.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.