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Piper PA-28-181 Archer
NewsLycoming Claims Fuel Aromatics May Be at Root of UND Fleet Valve Problems
The University of North Dakota had reported ‘abnormal exhaust valve recession’ before reverting back to 100LL aviation fuel.
Meg Godlewski![](https://www.flyingmag.com/uploads/2024/04/shutterstock_1853809516-scaled-e16996581483231.jpg?auto=webp&auto=webp&optimize=high&quality=70&width=1440)
![](https://www.flyingmag.com/uploads/2017/06/fueling1-e1670600759427.jpg?auto=webp&auto=webp&optimize=high&quality=70&width=1440)
![](https://www.flyingmag.com/uploads/2022/09/Pilot-and-copilot_adobe-stock-rs.jpg?auto=webp&auto=webp&optimize=high&quality=70&width=1440)
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