# SDR AUS20031185

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 30, 2003
- Submitted: January 5, 2004
- Operation: General aviation
- Make and model: Cessna 172R
- Registry model: [Cessna 172R](https://openairdocs.org/model/cessna-172r) (OpenAirDocs)
- Engine: Lyc IO360L2A
- Propeller: Mcauly IC235LFA7570
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Exhaust Valve
- Part number: IO360L2A
- Part serial: L2882951A
- Condition: Burned
- Location: Engine
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AUS20031185

## Discrepancy

(AUS) EXHAUST VALVES ON ALL FOUR CYLINDER BURNED.   CAUSED BY FAULTY SWAGING ON ENGINE INDUCTION PIPES WHICH ALLOWED LEAN MIXTURE TO CYLINDERS.

---
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.