Defense News reports that “the Pentagon has lifted some flight restrictions on F-35 Joint Strike Fighters, while inspections will continue for the foreseeable future, according to a Defense Department official.”  

“Speed restrictions were relaxed late last week from Mach 0.9 to Mach 1.6, while maneuverability restrictions were increased slightly from 3 Gs to 3.2, the official said.”  

“Other restrictions remain, however, including borescope inspections of the front fan section of each F135 engine every three hours.”  

“The restrictions are the result of a June 23 fire that severely damaged an F-35A model and led to the Pentagon grounding the fleet for a time while the cause of the problem was discovered. On July 15, the Pentagon allowed the plane to begin flying again within limited parameters.”