Now that this achievement is fixed, I figured that I would write a solution on how to actually get it, since both of the other solutions are out of date.
First of all, all of your difficulty settings in the assist menu need
to be set to True to Life for the entirety of the flight. If they ever get changed from this, (there's a couple ways that you can trigger this on accident) the achievement won't pop.
Therefore, for the entirety of your flight, you need to:
1. Never completely close the Checklist or ATC tab. Minimization is fine.
2. Never use the AI pilot. (Autopilot is fine)
3. Never open the VFR map.
So now, for the flight which I used. This flight is very simple, as the travel in which you need to do around the airports (especially the starting one) is relatively short. Keep in mind, you can use any route or any plane for this. The route just needs to be beyond 300 miles.
I flew from MMBT to MGGT. IFR Low-altitude airways.
Depart from Parking 1 from MMBT, and change the approach under MGGT to "ILS 02-Z"
Have your plane be the Textron Aviation Cessna Citation CJ4.
The total flight time should be a little over 50 minutes, which is very fast.
Go ahead and spawn in.
Your plane will be cold and dark. It can be frustrating to get it fired up, unless you know what to do.
The checklist is helpful, but it asks you to do way more than what is necessary. I will list the steps which you actually need to do.
First of all, press F3 (or whichever button on console) which revs your throttle up all the way to 100%.*Page refers to the page in which the action is listed on the checklist. The reason why I list it is so you can press the little eyeball icon to see where the button/lever you need to pull is located.*
1.Battery switch on (First page)
2.Avionics master switch on (Third page)
3. Push right engine starter (Second page)
3. Wait 5 seconds, Push engine run/stop (Right) (Second page)
4. Push left engine starter (Second page)
5. Wait 5 seconds, Push engine run/stop (Left) (Second page)
The engines will start to fire up. Once your plane starts moving, (with the parking brake still engaged) cut the engines down to idle. (F1 on PC)
Follow some ATC commands until it tells you to taxi to the runway. You need to go to the runway which is to the right of where you started. Come to a complete stop before the line (on the road connecting the main area and the runway) and clear yourself for takeoff through ATC commands.
Assuming you know how to use autopilot, get it set up so that you can immediately engage it once in the air.
If you do not know how to use autopilot:
From this position, you need to take off towards the right side of the runway, not the left. Go ahead and take off, and then once you're a little bit into the air, engage autopilot. You will now be flown the entire way there. You need to be here watching it though, as your ATC commands will most likely tell you to ascend and descend several times, which you cannot ignore.
Once you arrive, (near the airport) clear yourself for landing through ATC, and then make the landing. (be careful or you'll have to restart from the beginning)
Exit the runway on the nearest exit to the right.
Use the ATC a couple more times and select the option to taxi to a parking spot. Once you're told to do so, follow the yellow line. You're looking for three guys with a yellow device (push tractor) He is most likely either really close on the right hand side or on the left side of the runway. If he's not on the right, follow the yellow line to the left side of the runway, and you should be able to see him there.
Pull up close to the push tractor, (yellow device) and come to a complete stop, and cut your engines to idle. The achievement should now pop. Shut the engine down if you wish.
Hope this helps! Let me know if there's anything which I can add.