Jet Fuel Contaminated with Diesel Exhaust Fluid (DEF).
The FAA has identified four cases of DEF contamination affecting multiple turbine engine aircraft. Three of those events occurred in the United States and one in Brazil. In all cases, the affected aircraft experienced in-flight operational malfunctions, such as un commanded in-flight engine shutdown, resulting in emergency landings. In these cases, DEF was inadvertently confused with fuel system icing inhibitor (FSII) when servicing refueling vehicles.
Please obtain the Latest SAFO 18015 REV 1 dated 5/19/23. The Copy of this SAFO on DRS is not current. A current copy is attached to this Notice. Or, you can contact the AED with questions or concerns at: 9-AVS-AFS- 100@faa.gov (attention Propulsion Systems).
