I recently upgraded my 2nd-owner LNC2-235 to dual Dynon Skyviews. When complete, I discovered that each time the gear motor runs, the output of the networked sensors (GPS, EMS, and ADAHRS) gets interrupted, resulting in red X’s displayed on screen. When the gear cycle is complete, the EFIS returns to normal. Testing with the EFIS isolated from the aircraft’s electrical system - by operating only on their independent backup batteries - resulted in the exact symptom.
From that I concluded that RF from the pump motor must be interfering with the sensor signals. I then rerouted all sensor leads as far from the pump as possible, but still had only incremental improvement.
Now I’m thinking about ways of shielding the pump and it’s wiring in an effort to reduce their RF output.
What I would like to know is if anyone knows how to best accomplish this, and, if after reading this, anyone sees an alternate possibility of what could be causing the problem.
Thanks in advance for any feedback you might have for me.
Kevin Gregory
LNC2 – 235 / KHND
From that I concluded that RF from the pump motor must be interfering with the sensor signals. I then rerouted all sensor leads as far from the pump as possible, but still had only incremental improvement.
Now I’m thinking about ways of shielding the pump and it’s wiring in an effort to reduce their RF output.
What I would like to know is if anyone knows how to best accomplish this, and, if after reading this, anyone sees an alternate possibility of what could be causing the problem.
Thanks in advance for any feedback you might have for me.
Kevin Gregory
LNC2 – 235 / KHND