Has anyone else had problems unlocking this ? I've done several helper services around Cumberland (15 min ones), and a couple of return helpers (70min) and some full services too, on sand patch grade. But I don't think it's unlocking . Could It be issues here, where a dash 8 and a ac4400 are paired, and if you finish in the cab of a different loco, it discounts it ?
I've unlocked all 5 achievements for the dash 8 on SPG driving the dash 8 itself, I've not tried it where you end up finishing in a different cab like the ac4400.