The Alarming Threat of Diesel Exhaust Fluid Fuel Contamination
There are good reasons to be especially cautious airside when handling diesel exhaust fluid (DEF). Over the last 20 months, at least three incidents involving DEF fuel contamination have occurred. Two of which included Cessna Citation 550 twinjets carrying out air ambulance flights. Though all aircraft landed safely and there were no injuries, the occurrences speak to the importance of taking steps to mitigate or remove the risk of DEF contamination in fuel. The cause of these near-tragedies was the introduction of DEF into the fuel supply. The threat of DEF contamination of a fuel supply is a harrowing one, but, whether it’s by cautious loading of an aircraft tug or an update to ground crew training, with some basic precautions even near-tragedies can be averted. What is DEF? DEF is a non-hazardous fluid that, to meet federal environmental regulations, is added to the exhaust systems of diesel vehicles to break polluting emissions into water and nitrogen. While i...