ARGH!!!
Had this happen to me last night, I did take some damage on the last patrol but I cant remember if I left the guy in the repair slot, guess I did.
One more thing to remember NOT to do.
However what was even more frustrating is I was gettting the CTD at the very end of loading thats being talked about in another thread (second time this has happened this week). Tried to reload that save twice, no luck. Went back to the previous save, no luck, went back one more, still no luck. So I had to reload the save from base, before patrol and thats when I noticed he was gone (which is odd because I swear he was there when I saved it???). Add in the extremely long loading times for GWX and Im looking at half an hour of just trying to into the damn game... considering everything else in real life was going wrong yesterday I nearly lost it here.
So I ended up going for walk and then starting a new career....
I'll try that fix and see if I can recover him.