So under your selected aircraft you select FAILURES (like a engine fire). You can also set the time in minutes from blank to blank when the failure will take place. I set the failure to start in the 10 to 15 minute range but everytime the failure starts immediately on takeoff. Not 10 to 15 minutes as set. Immediately. Failures are useless if they cant be timed in the air.
Support said its a known bug on xbox and their is no set date to be fixed.