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Random avionics internals

If you got that kind of money, it is a bit strange that people would buy the g900x instead of the certified g1000.

I don’t think you can buy a G1000.

Certified Garmin stuff is sold only via authorised dealers and one of these is not allowed to sell you a G1000. Well, not for use in an aircraft. The G1000 is not certified except for OEM installs and some retrofits e.g. TBM700.

Well, I am 100% sure I could find a contact who would sell me a complete G1000 system, but it would be off the books and no warranty. I can similarly buy a G500 or an IFD540 but there would be no warranty on them; I would have to return the stuff to my contact. If I tried to return it to the mfg they would quite likely declare it a grey import and not touch it.

There is a separate channel, established in the USA but not discussed openly in much detail for obvious reasons, where an Experimental owner can buy some certified avionics “off the process” and still get a warranty. Avidyne and Garmin offer this (they have said so on forums there). I don’t know how much proof they need of the aircraft details… I bought a Sandel EHSI in that way, with a (nonexistent) “Experimental harness”. This happens quite a bit.

Administrator
Shoreham EGKA, United Kingdom

LeSving wrote:

It is not the aviation authority that approves radios.

I know. That’s why I wrote “as a radio,” not as avionics. I don’t know why you’re making such a mess of it. Certification is not something limited to aviation and there are many standards to certify a product against. Just so you can sell it, it’ll have to go through certification to establish it’s safe to use, it doesn’t cause interference. And because it transmits in a licensed spectrum, it stands to reason it’ll have to meet certain standard (just like the radio module in your phone). And if you want to install it in a “non-Annex 2” aircraft, it will need some more certification – I imagine this wouldn’t be the problematic part because connectivity is normally very limited.

LeSving wrote:

If you got that kind of money, it is a bit strange that people would buy the g900x instead of the certified g1000.

That’s simple, Garmin won’t sell it to you. And it would be even more expensive (really, 70k is more G500 based cockpit territory). IIRC even G900X is available only for certain kits. Perhaps that changed, I don’t watch non-certified avionics much.

Last Edited by Martin at 11 Aug 07:55

it doesn’t connect to anything

A radio with a NAV section can drive a CDI, an HSI, an autopilot, etc.

Administrator
Shoreham EGKA, United Kingdom

Peter wrote:

A radio with a NAV section can drive a CDI, an HSI, an autopilot, etc.

I was talking about a pure radio like the little Trigs. However, “anything” was an exaggeration (should have read it through properly before submitting) so I amended that statement.

Martin wrote:

so I amended that statement

Which is an AMC for EuroGA forum post certification, so yep, approved ;-)

tmo
EPKP - Kraków, Poland

Here is the KR87 ADF. I did not dismantle further because it is a spare unit on the shelf.


Administrator
Shoreham EGKA, United Kingdom

Martin wrote:

I don’t know why you’re making such a mess of it.

I’m not making the mess, it IS a mess. It has become a mess in later years since the authority stopped approving stuff by testing etc. There is no requirement for a radio to be certified, but that is now the only way for the authorities to “approve” a radio. That’s the telecom authority, the aviation authority couldn’t care less.

LeSving wrote:

I’m not making the mess, it IS a mess. It has become a mess in later years since the authority stopped approving stuff by testing etc.

Who told you this? We are testing all kinds of stuff to show compliance with certification specifications all the time, it’s a completely valid method to show compliance.

mh
Inside the sky.
EDXE, EDXF, Germany

Peter wrote:

I don’t think you can buy a G1000.

OK, I guess this could also mean that the g900x is just a “generic” g1000, not certified for any particular aircraft, perhaps?

mh wrote:

Who told you this? We are testing all kinds of stuff to show compliance with certification specifications all the time, it’s a completely valid method to show compliance

I know. It’s just that the telecom authority won’t do it themselves anymore, not in Norway at least. I had direct contact with the man who actually approved the MGL for 25 kHz some years back. He still works in the same office. MGL could send him test reports showing it would adhere to standards for ground equipment, but MGL didn’t want to do it because they had made the radio according to aviation standards, and didn’t see the point. I just think it’s strange that Trig manages to manufacture certified units of high quality at reasonable prices and others don’t.

A King indicator under test with the circuit board fitted to a extender to allow adjustment.

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