Just culture looks after people who have made mistakes. AT's actions were negligent, plain and simple so, I don't think it's unfair for the RAF to have removed him from his role.
Owning up to your own negligence does not make it any less serious. Personally, I think it's right that he has gone; he almost killed 200 people through complacency and negligence. I very much doubt that there is an airline out there that would have let him keep his job.