Bill,
I think you are right on all points, except . . . If the mechanic measured the height of the donut stack while the weight of the aircraft is on it, then a stack of tired donuts might measure shorter than a stack of better donuts. The weight of the aircraft would be compressing the stack. Don, Please go to Skyport's website and page down to near the bottom. Click on the link for information about the tail low and spacers. Print out that information and it'll help you calculate the thickness of the spacer needed to fix the problem. This is the most up-to-date version of the guidelines. http://skyportservices.net/ Ed
