Look man, the Air Force is axing people left and right and are just looking for reasons to get rid of people right now. That being said I was investigated for disenrollment one year ago and they approved me to stay in. What I did was get letters of rec from every Cadet in my class (300's at that time) and a letter of rec from the teacher whose class I failed. All the teacher wrote was that I tried my hardest or some bullshit, but it helped. Getting a lot of people on your side and who agree that you are an asset to the Air Force is key. The circumstances were different when I was investigated, and the class I failed did not affect my graduation plan, but this is from personal experience and fortunately everything worked out for me.