Hi Tarjei,

I want to make a pilot logbook in excel, and I have almost completed
the work, but I can't figure out how to do one function:

So, all your data is stored in sheet2, all other sheets are "reports"
on that data? Then you could try to create a pivot table on your data
in sheet2. You could list your planes with the sum of flight time etc.
etc.

Under Extras/Pivot tables you can start an assistant to create such a
table step by step, have a try.

arno