Incidentally, who says it isn't IFR right now? The rule says
you have to have a power source for the gyros... don't think
it says more than that. Check the airplane type certificate
data sheet; I'll bet it does not say VFR only. If not, all you
need is an altimeter and VOR check.

I might also worry about a heated pitot; does it have that?
Maybe venturi heat too :-) And you wouldn't punch any
200' overcasts. They would be running by 1000 feet though!

Bill Hale



gt wrote:
I would like to make my 1960 Cessna 172A IFR. Currently, I have only
venturi vacuum. My A & P stated that as there is no STC for a vacuum
pump intall, I need a form 337 field approval...I think it is form 337,
I could be wrong on that. Does anyone have information relating to
STC's and field approvals for vacuum pump installations on a
Continental 300-C?