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I installed one with my 335. My old radio shop had no clue how to program it. Found a new show. No problem.

I think we have beat the dead horse enough. You probably need the wires from the transponder. You might call Garmin and ask them as the install manual says it can be installed without encoder input so I would think the message could be turned off, but I cannot find it mentioned in the install...

I do not think so. Sent from my SM-G950U1 using Tapatalk

Do you have a nav indicator? Sounds like he just did a minimal install. For vfr, the encoder connection is not necessary. You will just get the no alt message. Just an annoyance. To make it go away, you will need to add the wires I mentioned earlier but it may not be worth the trouble. Sent...

That shows the RS232 is turned off and you are not getting altitude to the 420. Is there paper work with the install (a 337) showing that it was ifr certified? You could try turning the RS232 input to channel 1 ON. If the wires mentioned above are there that should fix it. If not, you will get...

The P4001 is a plug on the back of the 420. There are a couple ways the encoder could be wired to the transponder and 420. My manual shows the encoder wired via grey code to the transponder then RS 232 from the transponder to the 420. Might be worth a trip to the avionics shop.

The 420 is not receiving an altitude input from the encoder. Has it always done this since you got the plane? Should be a wire from GTX 327 Pin 20 to 420 P4001 pin 57 and GTX 327 pin 13 to 420 P4001 pin 60. Also check the 420 RS 232 input 1 is setup to receive the altitude .

The crimper the B and C sells for $45 will do the job. I used a similar one for a 430 w install. No problems. Bought my GTX 335 from Spruce with their special and a free pre made cable. What a mistake, not only did they wire it wrong but also filled all the empty holes with pins without...

On cool days and high humidity, the epoxy floors become a lake. I scraped the old paint off my hangar and left it bare concrete. I bought a 7X14 rubber mat from Costco. It fits nicely under the plane and is easy to keep clean as nothing sticks to it.

Yes. I installed a Dynon 10a as my primary adi and the G5 as primary HSI. Push the button, turn the dial, push button again and it is an ADI.

This is from the Garmin GTX 335 with GPS installation manual. Install the panel mount GTX 335 with GPS as a minor alteration in accordance with FAA Memorandum Installation Approval for ADS-B OUT Systems or FAA Notice 8900.362 Policy for Installation of ADS-B OUT Systems using the data in this...

Sounds like an antenna or wiring problem or possible GPS issue. I will see that message if I power up in the hangar and the gps cannot see the satellites. As char above says contact Garmin.

Check for egt leak blowing on the cht probe.

Step on the ball. Dead foot dead engine.

Try http://support.magellangps.com/support/index.php?_m=downloads&_a=viewdownload&downloaditemid=224

I have a 601XL and also fly the 701. Floyd Wilkes

If you are talking about the trim indicator lights, there was a discussion last week on the matronics list aeroelectric connection. I think the bottom line was the lights work off about 1.5 volts so it does not take much interference to light them up. I know in my aircraft, Zenith 601XL...