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Dual ARS to replace blind turn coordinator? :)

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jimmyz80 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jimmyz80 Quote  Post ReplyReply Direct Link To This Post Topic: Dual ARS to replace blind turn coordinator? :)
    Posted: 22 Jul 2021 at 4:54am
Our older Cirrus planes which are the initial target market for Vantage, have an old school turn coordinator gyro hidden behind the panel for the DFC90 to use as a secondary reference. Is there any chance with Vantage having dual ARS, you can complete certification with the DFC90 referencing those as two separate sources, and eliminating the gyro? It'd be nice to save a few pounds and eliminate a common source of problems.
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Post Options Post Options   Thanks (1) Thanks(1)   Quote AviSteve Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jul 2021 at 9:18am
It is my understanding that the turn coordinator comparator is not used in the DFC STC anymore.
Steve Lindsley
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Post Options Post Options   Thanks (0) Thanks(0)   Quote D-EACY Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jul 2021 at 10:43am
THAT would be really great and another good reason for the upgrade
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Aerochip Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jul 2021 at 11:09am
Originally posted by AviSteve AviSteve wrote:

It is my understanding that the turn coordinator comparator is not used in the DFC STC anymore.

Can you clarify this?  Could an existing DFC90 install in a Cirrus now remove the TC and how would that be accomplished, i.e. through a software change or ??
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Post Options Post Options   Thanks (0) Thanks(0)   Quote D-EACY Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jul 2021 at 11:13am
I understand that the second AHRS in the MFD replaces the TC in this respect.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AviSteve Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jul 2021 at 9:07am
Originally posted by Aerochip Aerochip wrote:

Originally posted by AviSteve AviSteve wrote:

It is my understanding that the turn coordinator comparator is not used in the DFC STC anymore.

Can you clarify this?  Could an existing DFC90 install in a Cirrus now remove the TC and how would that be accomplished, i.e. through a software change or ??
Yes, you would need the latest DFC90 software.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Aerochip Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jul 2021 at 2:06pm
Super.  Will remember this when the TC inevitably dies!  
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gremlin Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jul 2021 at 1:48pm
What is the latest DFC 90 software version, we just purchased ours in March and it was installed at our annual in April and the shop that did it kept the TC in there as well Looking at the PFD I can see the DFC90 Top Level Part Number as 510-00874-000_REV03

What would one need to do to get it updated? 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AviSteve Quote  Post ReplyReply Direct Link To This Post Posted: 28 Jul 2021 at 7:40pm
Originally posted by gremlin gremlin wrote:

What is the latest DFC 90 software version, we just purchased ours in March and it was installed at our annual in April and the shop that did it kept the TC in there as well Looking at the PFD I can see the DFC90 Top Level Part Number as 510-00874-000_REV03

What would one need to do to get it updated? 
Latest version was from 4/10/2014.  I don't have the part number handy, but I just happen to have the checksum for that version - 0x69CEC547 (which I'm sure makes me a real geek...).  You can check that on the PFD maintenance page.

If you need to update it, I'd first start with tech support.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gremlin Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2021 at 1:03pm
Okay lookes like I have that version, I see "DFC90 Application: 0x69cec547"

So I wonder why my installer thought I needed the TC kept in the plane. Does it do anythin gif it's still there?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AviSteve Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2021 at 7:04pm
Originally posted by gremlin gremlin wrote:

Okay looks like I have that version, I see "DFC90 Application: 0x69cec547"

So I wonder why my installer thought I needed the TC kept in the plane. Does it do anything if it's still there?
It won't hurt anything, but the DFC90 won't use it.
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Post Options Post Options   Thanks (2) Thanks(2)   Quote jimmyz80 Quote  Post ReplyReply Direct Link To This Post Posted: 30 Jul 2021 at 3:38am
From a response I found in another thread, the SB apparently only allows for the removal of the TC from planes that came equipped with STEC-30 or STEC-50 APs, but the majority of us whose planes came with the STEC-55X need to keep the TC.

I haven't seen the actual text, so maybe AviSteve can help verify this is true. If so, it's a bummer and I still hope Vantage will finally ditch the TC. :)


Edited by jimmyz80 - 30 Jul 2021 at 3:39am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gremlin Quote  Post ReplyReply Direct Link To This Post Posted: 02 Aug 2021 at 5:42pm
Yup I had the STEC-55x so that's why the isntaller didn't remove it, if there's something that shows it isn't being used and could be removed that'd be cool to have. Not a fan of keeping gear in the plane that's not being used
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Post Options Post Options   Thanks (1) Thanks(1)   Quote jimmyz80 Quote  Post ReplyReply Direct Link To This Post Posted: 02 Aug 2021 at 6:28pm
I can't hear you over the sound of "GYRO MISCOMPARE". I want so badly to toss that thing out...
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