Failed instruments

We had a vacuum pump failure a month ago, and husband did something I
think is worth mentioning. He keeps a number of Post It notes stuck to
the notepad he uses for flight plans and notes, and stuck one on the
face of every vacuum driven instrument. He said he's so used to
scanning everything to get a picture of the plane's environment that
he likes to have a reminder of which ones to ignore.

I'm sure there are other good ways to deal with this kind of thing,
but his idea looked pretty neat to me.

Tina.