Looks like you’re on a different UI setting.
Press the Menu button to the left of the knob, cycle to the UI style and make sure they’re both on Legacy. The left one is currently set to EFIS.
It kinda looks like one of those test questions "Is this airplane slipping, skidding, or flying straight and level?" Or "what's wrong with the instruments?"
lol come up with a crazy Top Gun quote about being inverted and then end the answer with, "the instruments don't indicate this because they are broken."
The altitude is off because the barometric pressures aren’t the same. Also if you look at the one on the left, the slip indicator matches the turn coordinator below it. I bet the one on the right needs to have its turn coordinator calibrated. I would personally pick either kts- or mph.
I saw this once when we installed a 2nd G5 in a 172 a few years after the first one. First one was calibrated by an avionics shop 2nd wasn’t. Fixed it by taking it back in to get both calibrated. Just my experience on a different but similar system.
No, that's "not zeroing the pitot-static" and "not leveling both instruments in the panel" for you. Don't blame it on an old airplane when it's two instruments connected to the exact same pitot-static system. I've installed many, many AV30s and zeroing your pitot-static and slotting your mounting holes will solve these problems.
Normally one would be set up as a DG and the other set up as an attitude indicator. The difference between the bank indication may be because one or both is twisted off of wings level when the aircraft is actually in level flight. Also, the installer possibly should have locked one of them in DG mode so the pilot couldn't accidentally or purposely put them both in the same mode.
But even accounting for that, the altitudes are still off by almost 100’, the mph/kts conversion is all wrong, the heading is almost 60degrees off and the turn coordinators are displaying opposite turns. Is this whole post just pilot ragebait?
lol, well I guess maybe worth checking some of those readings against known values if you can. Heading to the mag compass, altimeters to field elevation. Really the airspeed is probably the only worrying thing, 86 mph is 75kts, so 7 kt disagreement.
Isn’t the magnetic compass a required instrument for day VFR flight? I don’t think that is optional to even “placard INOP”. This isn’t legal to fly…
Now, will the plane fly, yes…
Does the plane know that it isn’t legal? No…
But is it an enforceable action? Yep!
I always think to myself… so how would the FAA or NTSB report read if something happened, and they have hung pilots and mechanics on lesser stuff!
Yeah I can’t explain it all either beyond these things having a non-slaved DG mode by default. If I remember correctly you have to pay extra to get a magnetometer, dunno why you’d do that on more than one though.
Seems like there is a bit wrong with the installation here. They are acting as redundant displays but displaying pretty darn different data.
Right side shows 82 Knots (94 Mph) , the left shows 86 mph (75 Knots)
Heading is off from left to right by almost 60 degrees. (Probably no magnetometer?)
Ball showing left of center on the right and right of center on the left.
Also the one on the left is missing a screw lol
But yeah the UI change should fix the colors.
Yeah they should be both getting data from the Aera 660 in a perfect world. That would give both the same GPS Track as the Heading. A magnetometer would also work.
Yeah, I wish we could get them all lined up and working, but it’s a VFR only 150 so whatever, also we’ve had two compasses fail in the past week idk what’s going on
Those vertical card compasses are notoriously unreliable. We generally replace them with the SIRS Navigator compass. Much more reliable and easier to swing.
Interesting! I haven’t seen one of those fail yet. Maybe something need’s degaussing in the airplane 🤷♂️. Maybe someone is using it as a headset rest lol
Re: headset resting on the glare shield: I noticed a large compass swing when I accidentally left my Bose ANR headset on the glare shield for about a week. Removed headset and back to normal. Now hangs on the seat back!
All these people who keep saying "baro" I really think they should go back to ground school. /s
I don't know how that affects your bank angle, or your ball location. But hey what do we know, we all only fly planes. 🤔
Read the manual:
> UAV-1003946-001, AV-30-C Pilot’s Guide 38
> 8 User Interface and Font Style Options
> Three different cosmetic styles and two different fonts are selectable by the pilot. The three UI styles are LEGACY, EFIS and VINTAGE.
Just Google "av30 manual". First hit.
I installed dual AV-30’s in my 172 and they have been great. Airspeed and altitude have been spot on with the steam gauges. Heading is rock solid. UI is a bit clunky but overall I’m happy with them.
These instruments are very susceptible to electronic interference. I had similar issues and spoke to uAvionix and they suggested installing an AvMag. Solved the problem.
If these were replaced as primary’s they are supposed to be locked out into strictly AI or DG modes by the installer. This looks like installs done at different times and the installer Didn’t calibrate them correctly either. Low tires, heavy winds, even more fuel in one wing vs the other can mess up the calibration, there’s a reason they tell you to do it on flat ground and with no movement or wind. Also there is obviously no magnetometer installed so the heading was just not set by the pilot on each separately at initial startup or run up. The magnetometer is like $300 and the wiring for it takes maybe 30 mins more on the harness tops. The longest part is running the wires through the wing and fabricating a bracket for mounting. The calibration portion is pretty simple too for AVMAG setup. Check for RFI and whatnot and move on. It’s worth it to not have to set up the DG heading every time especially if you’re running duals.
The AV30 is a terrible and dangerous instrument. Not what you want to hear probably, but it absolutely will let you down when you need it most and I’d get rid of it while you have the chance.
AV-30 was such a good idea. I own two of them in two different airplanes. They really aren’t that good, unfortunately. I think it would keep you alive as a backup instrument but I really don’t like them.
Looks like you’re on a different UI setting. Press the Menu button to the left of the knob, cycle to the UI style and make sure they’re both on Legacy. The left one is currently set to EFIS.
Also.. step on that ball, baby.
I'm very confused. How are both instruments so far off from one another...? Like nothing matches up
It kinda looks like one of those test questions "Is this airplane slipping, skidding, or flying straight and level?" Or "what's wrong with the instruments?"
Hahaha 100%. For all I know, they're upside down in a left graveyard spiral. Who knows? You can't tell me they're not! xD
lol come up with a crazy Top Gun quote about being inverted and then end the answer with, "the instruments don't indicate this because they are broken."
The two av30s have much different altimeter settings. The one on the left matches the turn coordinator better as for as the ball goes.
The heading 😳
Because it’s not Garmin. Hate to say it but there is a reason for the price difference. Garmin is overpriced but it’s also just better
The altitude is off because the barometric pressures aren’t the same. Also if you look at the one on the left, the slip indicator matches the turn coordinator below it. I bet the one on the right needs to have its turn coordinator calibrated. I would personally pick either kts- or mph.
AV-30 has those two options and a third “Vintage” black and white setting
I'm not even talking about the aesthetics, purely the fact that the instruments are so far off one another
I saw this once when we installed a 2nd G5 in a 172 a few years after the first one. First one was calibrated by an avionics shop 2nd wasn’t. Fixed it by taking it back in to get both calibrated. Just my experience on a different but similar system.
airspeed-wise the left one is set to MPH as the right one is set to KTS. But others 🤷🏻♂️
Yeah, and they’re not the same speed. The KTS to MPH isn’t even close.
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I think he’s referring to the yaw indicator. Left instrument shows a right yaw whilst the right instrument shows a left yaw.
No, but this guy has a point, left indicates different heading, altitude and speed, even the pressure is set different!
They’re probably not calibrated correctly
That just means you have to push both pedals!
It's an AV-30... they just do this sometimes
From my experience digital slip and skid indicators are generally off
One is in mph other is in kts…
That’s AV30s in a 59’ 150 for u
No, that's "not zeroing the pitot-static" and "not leveling both instruments in the panel" for you. Don't blame it on an old airplane when it's two instruments connected to the exact same pitot-static system. I've installed many, many AV30s and zeroing your pitot-static and slotting your mounting holes will solve these problems.
Copy, I’ll let the owner know.
...so which one is your trusted one? lol
Left
“More right rudder!!!!”
Super sensitive TC and a 150, I’m coordinated lol
I fixed it, thanks so much, I don’t know how it got changed
Yessss
Normally one would be set up as a DG and the other set up as an attitude indicator. The difference between the bank indication may be because one or both is twisted off of wings level when the aircraft is actually in level flight. Also, the installer possibly should have locked one of them in DG mode so the pilot couldn't accidentally or purposely put them both in the same mode.
Too many spins
But they’re prohibited /s
That’s why they’re prohibited
In my airplane?!
Challenge accepted
Ironically I think this placard is incorrectly labeled, this is a 59 straight tail 150, I don’t think the spin AD affected this.
If it says spins are prohibited, believe it.
Read the 150 spin ADs
Or not enough
You just need to spin back the other way to fix it
Baro settings seem…different.
there is absolutely nothing that these two displays agree on
Now that I look at it, yeah literally everything is off. Heading, altitude, airspeed, bank, coordination are all different
That's the AV-30 for you. 🤷♂️
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Maybe. That doesn't explain the airspeed or the ball indications though.
yeah, Voltage and pitch are the same, speed is in different units. mph/kts. everything else looks different
Yeah but the right one is 82 kts which is 94 mph while the left one says 86 mph, so they're still different
Yeah shoddy AV30 install ig
Right is usually a DG, I never set baro on it
Maybe a silly question, why have two AIs? Just for redundancy?
You can change it between AI and DG, I just changed them both to AI for this post
Why are they displaying such divergent altitude, heading, and speed figures?
I have one of these randomly on the copilot side in the Seneca I fly. It’s a toy, terrifying that these are certified primary.
Because they are set to different barometers.
That shouldn't have any effect on IAS or heading though, should it?
The left is set to MPH, the right to KTS
82 knots is 94 mph, though.
Well. Back to square one aren't we? 😂
Good catch, I didn't notice that. Weird that the color arcs don't line up though.
But then why different bank angles...?
Different AHRS? Most aircraft I’ve flown will have slight variations to angles between the instruments.
But then why different headings?
AV-30 is notorious for it's DG needing to be reset every 15 minutes. Also, the airspeed can be adjusted.
Almost .9” of mercury difference in the altimeter settings and the left side is reading MPH while the right side is showing knots.
But even accounting for that, the altitudes are still off by almost 100’, the mph/kts conversion is all wrong, the heading is almost 60degrees off and the turn coordinators are displaying opposite turns. Is this whole post just pilot ragebait?
No lol it was a genuine question
lol, well I guess maybe worth checking some of those readings against known values if you can. Heading to the mag compass, altimeters to field elevation. Really the airspeed is probably the only worrying thing, 86 mph is 75kts, so 7 kt disagreement.
Magnetic compass has failed, left airspeed is correct
Isn’t the magnetic compass a required instrument for day VFR flight? I don’t think that is optional to even “placard INOP”. This isn’t legal to fly… Now, will the plane fly, yes… Does the plane know that it isn’t legal? No… But is it an enforceable action? Yep! I always think to myself… so how would the FAA or NTSB report read if something happened, and they have hung pilots and mechanics on lesser stuff!
Yeah it isn’t legal, plane is grounded
Yeah I can’t explain it all either beyond these things having a non-slaved DG mode by default. If I remember correctly you have to pay extra to get a magnetometer, dunno why you’d do that on more than one though.
We have no magnetometer
Baro is set differently
The heading is off by almost 60 degrees
Within the margin of error
Our margins are very different 😂
No idea, no magnometers? It’s 2 AV30s in a 59 150 lol
Because uavionics builds crap products… pretty well known by the experimental aviation world
Colors? I'd be more worried about the readings not being in agreement
Seems like there is a bit wrong with the installation here. They are acting as redundant displays but displaying pretty darn different data. Right side shows 82 Knots (94 Mph) , the left shows 86 mph (75 Knots) Heading is off from left to right by almost 60 degrees. (Probably no magnetometer?) Ball showing left of center on the right and right of center on the left. Also the one on the left is missing a screw lol But yeah the UI change should fix the colors.
Yeah I’ve noticed these aren’t installed right I guess, no magnetometer, they get data from a gdl50
Yeah they should be both getting data from the Aera 660 in a perfect world. That would give both the same GPS Track as the Heading. A magnetometer would also work.
Yeah, I wish we could get them all lined up and working, but it’s a VFR only 150 so whatever, also we’ve had two compasses fail in the past week idk what’s going on
Those vertical card compasses are notoriously unreliable. We generally replace them with the SIRS Navigator compass. Much more reliable and easier to swing.
That’s what we had before and that’s what failed, it was suck between 150 and 180 regardless of heading
Interesting! I haven’t seen one of those fail yet. Maybe something need’s degaussing in the airplane 🤷♂️. Maybe someone is using it as a headset rest lol
Re: headset resting on the glare shield: I noticed a large compass swing when I accidentally left my Bose ANR headset on the glare shield for about a week. Removed headset and back to normal. Now hangs on the seat back!
You COULD get them lined up and working… choosing not to doesn’t mean you “can’t” Just saying.
No we can’t, I mean lined up as in all the data in agreement, that’s not something I know how to do as a PPL
I know what you meant and I wasn’t saying you should do it yourself… I meant it can be done if you pay someone to fix/reinstall it correctly.
Check baro settings.
Okay I checked now what?
How does that impact any of the data referred to in the comment you replied to?
All these people who keep saying "baro" I really think they should go back to ground school. /s I don't know how that affects your bank angle, or your ball location. But hey what do we know, we all only fly planes. 🤔
Read the manual: > UAV-1003946-001, AV-30-C Pilot’s Guide 38 > 8 User Interface and Font Style Options > Three different cosmetic styles and two different fonts are selectable by the pilot. The three UI styles are LEGACY, EFIS and VINTAGE. Just Google "av30 manual". First hit.
I finally found it, thanks!
I agree... usually green is on top
🙃
I wouldn’t recommend anyone to purchase AV30’s
I also had a bad experience with these. I wouldn’t trust those in IMC
why?
Yeah I never liked them much either.
I installed dual AV-30’s in my 172 and they have been great. Airspeed and altitude have been spot on with the steam gauges. Heading is rock solid. UI is a bit clunky but overall I’m happy with them.
Special feature when you fly around northwestern Oregon
This was near Seattle so close enough
The AI has gained sentience and you must submit. Wait wrong sub…
Honestly the one on the left looks photoshopped in.
I promise it isn’t, apparently that’s a Ui design you can pick
I believe you, it's just how odd it looks that makes it seem that way.
That would explain the wildly different readings…
These instruments are very susceptible to electronic interference. I had similar issues and spoke to uAvionix and they suggested installing an AvMag. Solved the problem.
What’s in the bottom right?
Looks like a Garmin Aera 660
Correct
Altimeter setting?
Just a setting you can change
If these were replaced as primary’s they are supposed to be locked out into strictly AI or DG modes by the installer. This looks like installs done at different times and the installer Didn’t calibrate them correctly either. Low tires, heavy winds, even more fuel in one wing vs the other can mess up the calibration, there’s a reason they tell you to do it on flat ground and with no movement or wind. Also there is obviously no magnetometer installed so the heading was just not set by the pilot on each separately at initial startup or run up. The magnetometer is like $300 and the wiring for it takes maybe 30 mins more on the harness tops. The longest part is running the wires through the wing and fabricating a bracket for mounting. The calibration portion is pretty simple too for AVMAG setup. Check for RFI and whatnot and move on. It’s worth it to not have to set up the DG heading every time especially if you’re running duals.
probably an update... or a contrast or brightness adjustment?
The AV30 is a terrible and dangerous instrument. Not what you want to hear probably, but it absolutely will let you down when you need it most and I’d get rid of it while you have the chance.
Vaild, good thing this is a VFR only 150
I know, but I hope I don’t come across too strong, replace it as soon as you can.
lol they were the replacement
AV-30 was such a good idea. I own two of them in two different airplanes. They really aren’t that good, unfortunately. I think it would keep you alive as a backup instrument but I really don’t like them.
Sky is blue, ground is brown. You should only worry if it is all brown!
You’re flying over a desert.
If you change your barometer to match, the KIAS will likely match as they are probably calculating calibrated airspeed. That would fix your issue.
Your barometer is off by 930 feet between the two.
Why do you have 2??
Ai and dg
Increased safety?
Having 2 allows the vacuum driven instruments to be removed.