CamTom12 wrote:I'm admittedly dumb on certified aircraft things, so pardon my ignorance on this:
If all your TCDS required instruments remain in the panel, why would any approval at all be required to add something like the G3X? Is a 337 required to panel mount an iPad/796?
Cam, First, you have to understand that you're dealing with the FAA, so please don't look for logic here. You will find opinions all over the place on whether instruments in CAR 3 airplanes (or FAR 23 airplanes for that matter) have to be TSO'd, STC'd or blessed by the Holy Father.
An example: A number of years ago, our maintenance shop went to the Merrill Field FSDO, and proposed installing the small Dynon EFIS in the panel of VFR only airplanes, Cubs and Huskys (so both CAR 3 and FAR 23). The FSDO avionics guy said no sweat, as long as all required equipment remained, and with a placard on the Dynon which said "Not for primary Information". None of these planes were IFR equipped, and none were equipped with vacuum systems or attitude gyros.
After a few of these installations were done, the Anchorage Regional Office of the FAA found out about this, and informed us that all these installations had to be removed, because they weren't TSO'd instruments. Long story short, our maintenance chief politely told the Region to stuff it, since these were "public aircraft".
But, that's how weird this whole deal gets. CAR 3 does not specifically require TSO'd equipment, so many argue that instruments shouldn't have to be TSO'd. The FAA seems to just say that they're the FAA and therefore they have to be TSO'd.
As noted earlier, though, the EAA is making some headway in that realm, which is refreshing. I can certainly understand why some sort of approval might be good for an IFR device, but as an auxiliary for a VFR only airplane?
Progress is slow, but hopefully it'll continue. It's really exciting to me that the gent on here got the feds to accept a G3X in an old airplane.....that is a sweet instrument system.
MTV