I had two new a/c units installed at my condo. They were too large to go up the elevator or stairs so had to be helicopter lifted to the top of the 29 story building.
Here are the videos of the helicopter lift of our a/c units:
Part 1: http://www.youtube.com/watch?v=TsM1JR-Te54
Part 2: http://www.youtube.com/watch?v=qq87ao90gr0
There is a cameo appearance by my wife and daughter at about the 7:30 mark in Part 2.