Bob Ellis
Well Known Member
Although some may think I have posted this in the wrong section please let me explain the issue ...
I have an MGL Voyager G2 EFIS and occasionally I get a red X over the AHRS element of the screen - signifying interrupted data. This is predominantly at my home airfield and initially I put this down to new solar farms built beside the airfield. Then it happened at destination airfields. I discussed with my MGL dealer and tried ferrite rings on the wiring into the EFIS but no joy. He suggested carefully monitoring any electrical inputs near the time of seeing the red X.
I then noticed that the X was happening almost exclusively on the first flight of the day and after selecting an electrical service. I adopted the Bob Nuckolls central point ground (only exception being wing tip landing lights - earthed to outboard rib). With that last bit of information in mind I left the landing lights off for a few flights to discount that as an issue and the red X still appeared.
So if say switching on the fuel pump brings up the X I can make one blip on the pitch trim and it disappears. So it seems making a switch selection can leave "noise" on the electrical system that if loud enough cuts out the AHRS data and ergo the red X.
I wired the aircraft myself but I don't have the electrical knowledge to diagnose this problem and seek advice from the electrical gurus here on the forum.
I have an MGL Voyager G2 EFIS and occasionally I get a red X over the AHRS element of the screen - signifying interrupted data. This is predominantly at my home airfield and initially I put this down to new solar farms built beside the airfield. Then it happened at destination airfields. I discussed with my MGL dealer and tried ferrite rings on the wiring into the EFIS but no joy. He suggested carefully monitoring any electrical inputs near the time of seeing the red X.
I then noticed that the X was happening almost exclusively on the first flight of the day and after selecting an electrical service. I adopted the Bob Nuckolls central point ground (only exception being wing tip landing lights - earthed to outboard rib). With that last bit of information in mind I left the landing lights off for a few flights to discount that as an issue and the red X still appeared.
So if say switching on the fuel pump brings up the X I can make one blip on the pitch trim and it disappears. So it seems making a switch selection can leave "noise" on the electrical system that if loud enough cuts out the AHRS data and ergo the red X.
I wired the aircraft myself but I don't have the electrical knowledge to diagnose this problem and seek advice from the electrical gurus here on the forum.