Air Force lifts F-35 flight restrictions at Luke AFB

The Air Force has lifted temporary flight restrictions placed on F-35A pilots at Luke Air Force Base, AZ, after a string of physiological incidents were reported at the installation.

Air Force spokeswoman Maj. Rebecca Heyse said the altitude restriction, which limited pilots from flying above 25,000 feet, was lifted Wednesday.

"Since the restriction was placed June 20 officials have worked with the joint program office Physiological Event Team and other subject matter experts to research possible causes of five unknown physiological incidents in five weeks between May 2 and June 8," Heyse said.

Although the team has not identified a singular cause of the events, the base has implemented measures to mitigate the likelihood of future events, including refined training processes and reduced exposure to carbon monoxide.