This is story related and cannot be missed.
This achievement is available to acquire in mission 12.
At the end of the mission you will be attacked by another ace pilot. Just like the previous pilot they are more advanced flyers and have more health than standard. The two tactics for these are to either follow the pilot until he goes outward to try to get on your six, or you could fly out yourself and hopefully will not get followed so when you turn around you can cause some real damage.
The achievement will unlock once the enemy Ace is down.