GNS430 to 430W upgrade install

[BobTurner]

Quite honestly I don?t think anyone, including the FAA, has figured out exactly what ?meets the TSO performance specs but is not TSO?d? means, or how to enforce it. As far as I can tell they?re just leaving you to do what you think is best.

[DougCronkhite]

Originally Posted by RhinoDrvr

Hello,

I my GNS430 should be coming back soon as a GNS430W from Garmin. My understanding is that the reinstall should be as simple as;

1. Remove and Replace the GPS antenna with the included WAAS unit.
2. Replace current cable from antenna to 430 with an RG400 cable.
3. Slide the 430W into the current tray.
4. Enjoy the increased climb performance from a lighter wallet.

Are there any other steps to complete the install? I can?t find any instructions anywhere for upgrading from a 430 to 430W.

Also, is there any issue with flying the box for a few hours before replacing the antenna and coax? I?m planning on going to OSH and would like the second radio, and can do this work immediately post OSH.

What's the cost these days to do this upgrade? I have a older non-waas 430 as well..

[rolivi]

Looks like $4500 to Garmin plus whatever your local shop gigs you for.

But it's worth it!

https://buy.garmin.com/en-US/US/p/597181

[Walt]

Originally Posted by rolivi

Looks like $4500 to Garmin plus whatever your local shop gigs you for.

But it's worth it!

https://buy.garmin.com/en-US/US/p/597181

The other option is sell the 430 and purchase a 650, in the long run I think upgrading to the 650 is a better investment IMO.

[tim2542]

Originally Posted by Walt

The other option is sell the 430 and purchase a 650, in the long run I think upgrading to the 650 is a better investment IMO.

Or better swap it out for the Avidyne 440, its a direct slide in, no work needed behind the panel except run an audio line to the audio panel if you want the audio alerts. To go from a 430 to a 650 would be a complete tray and harness swap out. But I agree, I dont know how long big G will continue go support the 430 and Id not put any big money in one.
Tim Andres

[BMC_Dave]

If you email G3xpert they should be able to assist without having to go through an avionics shop, for experimental anyway.

[DougCronkhite]

Starting to think keeping my airplane IFR certified just isn't worth the money considering how little I fly IFR

[jliltd]

Originally Posted by BobTurner

As you probably know a glare shield mounted antenna is not in compliance with the TSO.

That might be so but many Cirrus do it with twin GA35 WAAS antennas under the glareshield. And Garmin field engineers have allowed it for Bonanzas with the big broad windshield.

YMMV

[ploucandco]

Well, but the recommendation is on top of fuselage:
https://www.askbob.aero/node/436

[az_gila]

Originally Posted by ploucandco

Well, but the recommendation is on top of fuselage:
https://www.askbob.aero/node/436

That's a 10 year old notice and it has this section in it that is interesting...

The current receiver and antenna performance standards use a conservative estimate for intra-system noise environment and antenna gain patterns that provides significant signal margin. However, the margin available today will gradually decrease as new systems, signals, and satellites come on-line over the next decade. This decrease could potentially cause decreased LPV availability or loss of GPS/WAAS navigation on Cirrus aircraft with antennas mounted under the glareshield.