Are we just talking about a restraining order? If so, that's the oldest trick in the book in divorce cases and nobody will take it too seriously unless there is an actual domestic abuse event to go with it.

If your ex just made up some BS with ZERO evidence other than her word, well there is not likely to be a conviction and I think charges or an arrest can probably be explained. Most people understand how these things transpire.

But if there was an actual incident worthy of charges and a plea deal, you are going to have a tough time in airline aviation..you might get picked up by a bottom-feeder regional when they are desperate, but that's about the best you can hope for IMO. This is an industry where more than one or two recent moving violations can sink you. After the passage of many years your prospects might improve.

As someone said, you might have to weigh the risks of trial against career destruction via plea deal. A major factor would be how far along in aviation are you? If you have thousands of hours and many tens of thousands in debt it might worth risking. If you are a student pilot, probably better stay out of jail and switch careers...I doubt law school or even med school would have a problem with something like this.

I'm pretty sure that arrests, charges, and convictions (including plea deals) involving assault will be in the FBI database, so you should probably be honest at interviews.