A question to all IFR pilots concerning the FAR 91.171 VOR-Check:
Is a check that uses a GPS signal from the GNS430 to check the VOR-accuracy a legal substitute for the types of checks specified in the FAR?
At my hometown airport, there is no VOT or designated surface-checkpoint etc. (outside U.S.!), so what I can do is check the bearing from a VOR that’s 10 miles away using the GPS, then tune the VOR and set the GPS bearing indication on the OBS and check deviation. This is probably a very accurate check, but probably not approved by 91.171. Does anyone know for sure?
One more question on IFR-curency: At which moment exactly do I need a current database on my GNS430 to be legal for IFR? I mean, GPS is not generally required for IFR at all. Do I need the current database as soon as I enter SR20/G in the flightplan? Or, as soon as I fly an NDB approach using the GNS430?
BTW, do you “C”-version owners you keep both of your GNS430s current or just one?