Florida Aviation Business Association
Serving the General Aviation and Business Aviation Community Since 1946

Diesel Exhaust Fluid (DEF) Contamination Risk Alert

Our industry has seen several incidents in recent months where DEF was accidentally injected into jet fuel instead of FSII, causing significant aircraft damage. Although none of these incidents led to an aircraft crash, there is a substantial risk of engine failure in aircraft fueled with DEF contaminated fuel. NATA urges its members that utilize Diesel Exhaust Fluid (DEF) and Fuel System Icing Inhibitor (FSII or Prist) to review their storage, handling and personnel training procedures to prevent dangerous fuel contamination. The Federal Aviation Administration (FAA) has released a Special Airworthiness Information Bulletin (SAIB) that addresses the dangers of DEF contaminated aviation fuel. In December of 2017, NATA released a DEF Contamination Prevention training course through its Safety 1st Supplemental Safety Training program. This course is provided free of charge to anyone in the industry and could help prevent future incidents related to DEF Contamination. For complimentary access to the DEF Contamination Prevention course, please click here. Additionally, NATA provides multiple resources to assist and educate our members on aviation fuel management. READ MORE (NATA)


NATA Safety 1st Alert

OBP DEF Handling and Contamination Prevention

Misfueling Prevention Training 

NTSB Alert

Aircraft Diesel Exhaust Fluid Contamination Working Group Report & Recommendations