Am I right in thinking that there has yet to be a definitive statement on what the cause of the engine fire was....
Found this news item from a Hartford newspaper which suggests the root cause has not been isolated yet, but P&W expect to announce a fix by the end of October. The USMC's IOC will not be adversely affected by the problem, apparently.
I'm sure someone will post if they have seen or know anything different.
LF
Pratt & Whitney Says F-35 Will Be Combat Ready In July - Hartford Courant