Fuel
NTSB Issues Warning: 'Don't Foul The Fuel!'
The NTSB alert outlines several incidents involving DEF contamination and provides guidance on avoiding such an event.
If diesel exhaust fluid (DEF) is inadvertently added to jet fuel, NTSB warns, it will react with certain chemical components to form crystalline deposits in the fuel system that can accumulate on filters, engine fuel nozzles, and fuel metering components, resulting in a loss of engine power
If diesel exhaust fluid (DEF) is inadvertently added to jet fuel, NTSB warns, it will react with certain chemical components to form crystalline deposits in the fuel system that can accumulate on filters, engine fuel nozzles, and fuel metering components, resulting in a loss of engine power

In the wake of several incidents involving the contamination of jet fuel with diesel exhaust fluid (DEF), the National Transportation Safety Board (NTSB) is highlighting the dangers of such contamination with the release this week of a new safety alert (SA-079) and an accompanying poster. The safety alert warns jet fuel providers to take measures to prevent the possible contamination of DEF into jet fuel.