OR75

Who supplies the replacement unit makes a big difference if someone shows up with a new unit bought at Spruce or other and asks the shop to perform a 15mn job, things won’t add up.

And a TC has a S/N

I am staying on topic : 1 amu sounds reasonable

I met a Henry at a Mooney gathering in Santa Inez years ago. I had just installed a scimitar prop and he had one so we talked about that. Nice gentleman. I was hoping it would not be him involved in this accident until I saw his full name. Sad. RIP Henry.

start with something more basic before overhauling .... The connector in the back of the console needs to be seated correctly. The frame/box that houses it makes the "bite" of the connector very "weak" . i would check that first

if you are getting a used GNS430W, you must be cost conscious (nothing wrong with that, it is a good unit) What i would do:: connect your #1 GNS430W to a G5 and use the GPSS feature (with GMU11,GAD29B and GAD13) connect your #2 GNS430W to the GI106 you currently have

why do they want to overhaul it ? Did you check Stockton propeller ? used them years ago. Good shop. i have not used them recently

a primary on the wrong side is useless Replace your AV20 with an instrument that can be primary . The RC Allen is a good option with very little wiring required ( unlike the G5) move the av 20 to the copilot side if you don’t know what to do with it

I was answering why the installation cost was more expensive. actually if less boxes need to be installed, if anything, the installation of a GI275 should be cheaper than the install of a G5

Understood, but that’s factored in the price of the instrument as it should be . More capable instrument , more expensive.

Yes, you have missed a big part. The G5 you can buy and have it installed by any AP/IA the GI275, you have to go to a Garmin dealer. huge difference

I wonder if the GPS position information is transmitted between 2 G5s connected by a can bus ( in case only 1 G5 is connected to an antenna and rs232 signal is lost )

Honestly, it sounds complicated for what you get the G5 has a backup battery . You can have an external antenna to have GPS position an iPad or iPhone is a cheap gps navigation backup … the only times I would want to get a clearance before starting an engine would be at major airports (class B ) where you may have to wait on the ground between clearance and clearance to taxi. I like getting the engine warm before taking off anyway. And if I lost the alternator , I would want to land . That’s what light signals are for. just my 2 cents , recognizing every operates differently

Why wouldn’t it be if you get the paper TSOed signal ?

Ok ... no one brought that up .... I want to know what that “go around” switch does

No it is not. You need at least 1 GI275. and if you want to get rid of the vacuum system , you need to add: a 2nd GI275 or a TC and a G5 (HSI) or 2 G5s (AI / HSI)

I think I understand what goes on: the GI275 requires a backup AI or a TC ( see the install limitations part) a second GI275 plays that role because it is reversionary. A G5 is not. But if a G5 is installed as an AI (and not an HSI) then you have your backup .

It is attached with bolts and nuts , not screws ( at least the original OECO )

For a J, it is inside the cockpit

Had the same issue and replaced the OECO with a zeftronics. Issue gone . not easy to replace but not that difficult either. Need to remove copilot seat and whatever is on the right avionics stack if any. A wrench with a long extension on the cabin side and another person on the engine side of the firewall.

The GTP 59 would add $300 but honestly the other OAT probe works just fine

the 2 G5 stack is 5500+tax (the second does not require the GMU and the GAD. Add $250 if you want the OAT (which is great for winds aloft and density altitude) The vacuum AI is still primary. Why couldn't you have: GI275 (AI) and 2 G5s (HSI/TC) ? or a GI275 (AI), a G5 (HSI) and the electric TC (not talking aesthetic)

Ok ... i guess I need to elaborate ... i replaced my TC with a G5 and my DG/GI106 with a second G5 ... they back each other I am waiting for the Vacuum AI to go belly up to look at the option of replacing it with. GI275. I chose not to install the AI G5 on top of the HSI G5 because I did not want to oval the top 3 1/8 hole I am surprised by the cost you have for 2 G5s installed

My preferred option would be to have a G5 to replace the DG/Indictor ( so effectively a G5 used as an HSI) and provide GPSS and a GI275 to provide attitude information

G5 as an HSI and GI275 to provide attitude ? the GI275 can do both I believe but that’s too much in one indicator imho