# SDR 2022FA0000570

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 31, 2020
- Submitted: October 6, 2022
- Operation: General aviation
- Aircraft: [N427DA](https://openairdocs.org/aircraft/N427DA), registered now
- Make and model: Diamon DA20-C1
- Registry model: [Diamon DA20-C1](https://openairdocs.org/model/diamond-aircraft-ind-da20-c1) (OpenAirDocs)
- Aircraft serial: C0247
- Engine: Cont IO240B
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Exhaust Valve
- Condition: Sticking
- Location: Nr 3 Cylinder
- 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/2022FA0000570

## Discrepancy

DURING 100 HOUR INSPECTION, FOUND NO 3 EXHAUST VALVE STICKING. CLEANED GUIDE, CONTINUED IN SERVICE. 94 HOURS TIS LATER, CYL NO 4 EXHAUST VALE IS STICKING, WITH IMPACT MARK ON PISTON, INSTALLED A REPAIRED CYLINDER/SERVICEABLE PISTON. 35.7 HOURS TIS LATER, CYNLINDER NO 2 EXHAUST VALVE IS STICKING. INSTALLED A REPAIRED CYLINDER/SERVICEABLE PISTON. CLEANED NO 1 EXHAUST GUIDE. WE HAVE BEEN USING PHILLIPS XC 20W50 SINCE TAKING OWNERSHIP  OF THIS AIRPLANE IN NOV 2019. PRIOR OPERATOR USED SHELL PRODUCTS. THIS SCHOOL PERATES 5 DA20C1S AND THIS IS THE FIRST INSTANCE OF VALVE STICKING WE HAVE EXPERIECED.

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