# SDR CA040415002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 4, 2004
- Submitted: July 22, 2004
- Operation: General aviation
- Make and model: Cessna 172
- Registry model: [Cessna 172](https://openairdocs.org/model/cessna-172) (OpenAirDocs)
- Aircraft time: 4,234 hours
- Engine: Cont O300A
- Propeller: Mcauly 1A170*
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Valve Guide
- Condition: Worn
- Location: Cylinder
- Component: Cylinder, Cont
- Component part number: SA10200A
- 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/CA040415002

## Discrepancy

(CAN) CYLINDER NR 3, 4 AND 5, EXCESSIVE OIL CONSUMPTION AND LOW COMPRESSION.  ENGINE WAS RETURNED TO OVERHAUL FACILITY WHERE IT WAS DISCOVERED THAT 3 OF 6 CYLINDERS HAD EXCESSIVE PLAY IN THE EXHAUST VALVE GUIDES WHICH CAUSED THE VALVE TO BECOME COKED AND STICK IN THE GUIDE. CYLINDERS MFG. S/N: NR 3, 31109,NR 4, 31215, AND NR 5,  31213.

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