G1000 intermittent Heading problems
Thread Starter
Joined: Oct 2006
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From: Bristol
G1000 intermittent Heading problems
Has anyone else experienced intermittent G1000 magnetometer/AHRS failures on the ground/in-flight, causing the Heading Indicator to red X? Particularly in very warm weather and/or after when the aircraft has been parked over steel tie-down wires? (Not fixed by pulling the CBs; sometimes 'fix themselves'. And of course no fault found when at the avionics organisation...)
Joined: Mar 2007
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From: Not close enough to my aircraft !
I have a C182T -2008 model and have had 2 AHRS failures in flight...one in IMC !(Good practice though on standby's)! At first I thought there were spurious heading problems and then eventually the big red X appeared. This IS a known problem with Garmin 1000 ... AVwebFlash Complete Issue
Have a look at that link and if you need anything else let me know.
Easlily rectified by an approved centre by changing the AHRS unit which takes longer to do the paperwork than the change itself. Make sure you have the G1000 system CD as they will need to re-install the software to the correct configuration from your aircraft.
Have a look at that link and if you need anything else let me know.
Easlily rectified by an approved centre by changing the AHRS unit which takes longer to do the paperwork than the change itself. Make sure you have the G1000 system CD as they will need to re-install the software to the correct configuration from your aircraft.
Joined: Feb 2005
Posts: 551
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From: England
The first time I had that problem, on a DA40, it was fixed by replacing the right hand aileron to eliminate its steel counterbalance, and moving the magnetometer further out in the wing (see RSBD4-052/3 here). However, it's started again, so this time I'm having the wiring to the magnetometer checked. Of course, it's behaved perfectly since I booked it in, but I'll let you know if they find anything.
Joined: Jun 2006
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From: Maders UK
I had a similar problem with my G1000 equiped aircraft 4 years ago. Funnily enough I only lost the heading/CDI at night (when I most needed it).
Turned out there was some kind of short between the NAV light wiring and the magnetometer/AHRS - hence it only happening at night.
The aircraft manufacturer produced an SB which rectified the problem.
Pain in the butt was I had to pay for the work! (parts were free)
This is the downside of buying an aircraft with what was (at that time) breakthrough technology - you become a test pilot and help them iron out the defects in the system.
SB
Turned out there was some kind of short between the NAV light wiring and the magnetometer/AHRS - hence it only happening at night.
The aircraft manufacturer produced an SB which rectified the problem.
Pain in the butt was I had to pay for the work! (parts were free)
This is the downside of buying an aircraft with what was (at that time) breakthrough technology - you become a test pilot and help them iron out the defects in the system.
SB
Joined: Nov 2012
Posts: 1
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From: Sydney
Hello Soay,
I am having a similar problem in a DA40 at the moment. i have replaced the GMU44, GRS77 and the config module. I am contemplating about relocating the GMU44. How did you end up going with your fault?
Any assistance will be greatly appreciated.
I am having a similar problem in a DA40 at the moment. i have replaced the GMU44, GRS77 and the config module. I am contemplating about relocating the GMU44. How did you end up going with your fault?
Any assistance will be greatly appreciated.
Joined: Sep 2006
Posts: 68
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From: UK
I had it in a DA40 and it turned out to be bent pins connecting the loom to one of the boxes that you mention.
I'm sorry that I can't remember which, but ask the avionics chaps to check the loom for chafing and to check all the pins.
It was an intermittent problem and often impossible to reproduce on the ground. I took a picture of it at FL100 with a thumbs down...
I'm sorry that I can't remember which, but ask the avionics chaps to check the loom for chafing and to check all the pins.
It was an intermittent problem and often impossible to reproduce on the ground. I took a picture of it at FL100 with a thumbs down...
Joined: May 2001
Posts: 4,631
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From: UK
What aircraft?
The da40 problems mentioned hear i have experienced or heard of; they can take some fault finding so expect the red cross not to always go away after the first trip to the engineers in my experience.
The da40 problems mentioned hear i have experienced or heard of; they can take some fault finding so expect the red cross not to always go away after the first trip to the engineers in my experience.
Joined: Feb 2005
Posts: 551
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From: England
Originally Posted by borgie
Hello Soay, I am having a similar problem in a DA40 at the moment. i have replaced the GMU44, GRS77 and the config module. I am contemplating about relocating the GMU44. How did you end up going with your fault? Any assistance will be greatly appreciated.
Joined: Dec 2011
Posts: 6
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From: Canada
Heading Problem
Hello Scooter Boy
We are having the same problem with the Heading Failure. We called the factory and they told us they do not have any SB out. Can you PLEASE help us out and tell us where you got the info or what you did?
Can you please email me!!!
Riaz
1 868 790 5277
[email protected]
We are having the same problem with the Heading Failure. We called the factory and they told us they do not have any SB out. Can you PLEASE help us out and tell us where you got the info or what you did?
Can you please email me!!!
Riaz
1 868 790 5277
[email protected]
Thread Starter
Joined: Oct 2006
Posts: 117
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From: Bristol
Hdg failure - wiring issue
After loads of time try ing to debug, turned out to be a simple set of bad crimps. Suggest you get this checked out first - as an example, with the problem I had [which had been looked at during two weeks by 4 avionics shops including the Dimaond factory in Canada], in the end IAE at Cranfield had it sorted in less than an hour (where others had spent days changing AHRS, magnetometer etc.) as IAE started at the 'simple' level of just checking the wiring properly first.
It is hard to do as it involves contortions to get into the various places in the wiring loom (and there are 4 connections between the AHRS in the rear avionics rack and the magnetometer in the wing) so lots of avionics shops seem to feel it is easier simply to swap units out in the rear avionics rack rather than properly trying the basics of checking reliable continuity at the connectors and pulling on the wiring into the connectors to see if the wires are secure.
It is hard to do as it involves contortions to get into the various places in the wiring loom (and there are 4 connections between the AHRS in the rear avionics rack and the magnetometer in the wing) so lots of avionics shops seem to feel it is easier simply to swap units out in the rear avionics rack rather than properly trying the basics of checking reliable continuity at the connectors and pulling on the wiring into the connectors to see if the wires are secure.
Joined: Sep 2017
Posts: 1
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From: Houston
Intermittent problem with Garmin G1000 heading
I have a C182T -2008 model and have had 2 AHRS failures in flight...one in IMC !(Good practice though on standby's)! At first I thought there were spurious heading problems and then eventually the big red X appeared. This IS a known problem with Garmin 1000 ... AVwebFlash Complete Issue
Have a look at that link and if you need anything else let me know.
Easlily rectified by an approved centre by changing the AHRS unit which takes longer to do the paperwork than the change itself. Make sure you have the G1000 system CD as they will need to re-install the software to the correct configuration from your aircraft.
Have a look at that link and if you need anything else let me know.
Easlily rectified by an approved centre by changing the AHRS unit which takes longer to do the paperwork than the change itself. Make sure you have the G1000 system CD as they will need to re-install the software to the correct configuration from your aircraft.
Joined: Jul 2020
Posts: 1
Likes: 0
From: California
I have a Cessna 206T with G1000 that has the same issue. Loosing Heading in the PFD for 2-5 min during flight (big red X for HDG and no compass rose) at random times during the flight. Ususally lasts less than 5 min. Exchanged the AHRS unit and that didn't fix the issue. Any tips and suggestions greatly appreciated.
Joined: Jan 2021
Posts: 1
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From: GA
I have a Cessna 206T with G1000 that has the same issue. Loosing Heading in the PFD for 2-5 min during flight (big red X for HDG and no compass rose) at random times during the flight. Ususally lasts less than 5 min. Exchanged the AHRS unit and that didn't fix the issue. Any tips and suggestions greatly appreciated.
Joined: Apr 2024
Posts: 1
Likes: 0
From: Texas
C206pilot
Joined: Nov 2014
Posts: 1
Likes: 0
From: Elmsett
I am having he same problems with losing HDG on my 2023 206. It is under warranty but after 18 months I still have the problem which is getting worse. With mine it mostly happens when flying broadly south.
I have had 2 new magentometers and a new AHRS unit but still have the problem. Wiring has been checked and an additional earth strap fitted to bond wing to fuselage but I still have the problem which is incredibly frustrating with a brand new aircraft
The latest suggestions that Ive had are to fit a new wire connection direct from the mangentometer to the AHRS to bypass the wiring loom and connections and to fit a second magnetometer in the other wing - both of whcih I am hoping to try soon.
Any other suggestions or solutions would be very very much appreciated
I have had 2 new magentometers and a new AHRS unit but still have the problem. Wiring has been checked and an additional earth strap fitted to bond wing to fuselage but I still have the problem which is incredibly frustrating with a brand new aircraft
The latest suggestions that Ive had are to fit a new wire connection direct from the mangentometer to the AHRS to bypass the wiring loom and connections and to fit a second magnetometer in the other wing - both of whcih I am hoping to try soon.
Any other suggestions or solutions would be very very much appreciated
