FAA Halts Unleaded Avgas Flight Tests in PAFI Program
An evaluation of issues that have cropped up with the two options tested under the PAFI program is pushing back the timeline of the program by a year.

The FAA has suspended flight-testing and certain engine trials of the two drop-in unleaded fuel options under evaluation to replace leaded aviation gasoline through the Piston Aviation Fuels Initiative (PAFI) and extended the target completion date of the PAFI program by one year to the end of 2019. 


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