After 6 years of Mooney ownership I'm doing my first owner assisted
annual. Most of my previous annuals have been done by factory service
centers. I'm quite a good wrench around cars so this experience is
mostly about me learning the standards & practices of aircraft work.
I'm amazed by a couple things...
1) The number of things I found that were not done that I'd paid to
have done at previous annuals.
2) The number of things done wrong (like no cotter key in the wheel).
3) The amount of work an annual really requires. It took me 6 hours
just to remove all the inspection panels (including drilling out
several dozen screws). Lubing the 150 lube points wont go too quick
either.

Its also interesting to me how many things are safety wired while other
things (that seem more important) are not. Brake calapers are safety
wired but fuel lines are not, etc. Its quite depressing to see my plane
in so many pieces. I've also discovered that its extreamly irritating
that the aircraft parts places are closed on weekends.

I would highly recommend this experience to any aircraft owner who is
comfortable with a wrench.

-Robert