Twilight sets out to learn more of the ways of the world, and soon decides that the whole planet is disorganized, insanely dangerous, and desperately needs to be fixed. And she's just the mare to do it... with a little help from her friends.
Also, there are sky-pirates!
Book 3 of the Alicorn Adventure series.
A few extra, slice-o-life chapters are here: On the Rocks