@zeto.r: Do you know what is inside of tail of aircrafts. APU is important to start engines or supply air-conditioning also it provides 115VAC to support aircraft systems. But what if you need to remove it. You can of course fly without it, but such thing requires a lot of limitations. Also Center of gravity is impacted since you lost weight on the tail 200KG. #austrianairlines #creatingjourneystronger @Austrian Airlines