Ross Oliver wrote:

So here's a question I had never thought of until getting my
instrument rating and owning an IFR-equipped aircraft: how long
should records of VOR checks be retained? Do they need to be
retained at all? Can the FAA come to me and ask, "Remember that
IFR flight to SLO you made 2 years ago? Show us the VOR check for
that flight."

This came to mind because the next VOR check entry will fill up
the form I have been using, and I'll have to start a new one. So
I have to decide whether to discard the filled sheet, or save it
somewhere. Is there any value to saving these with the aircraft
maintenance records?

Happy landings,
Ross Oliver

What everyone says is true, from 6 months for investigations, to 1 year
for maintenace inspections, to "until the next time."

If you are the kind of guy who likes to cover all the bases, keep them
for 1 year. Beyond that you have zero exposure. And, they can be kept
anywhere although the most current one is best kept in the aircraft in
the event of a ramp check. It can, however, be written on a cocktail
napkin. ;-)