Here's an observation/question:
Garmin G3X (370) with 400WAAS, GNC255, ADHRS, Eng monitoring, G5.
I have noticed from the beginning that the CAN bus can be finicky, i.e. you have to have the boxes all grounded together, early on Garmin said only ground the shield of the CAN bus at the two terminating ends, now their most recent guidance is to ground the shield at every CAN connection. And so on. Once you figure it out, it is simple though
When it is working all is good, and I have never had an issue.
Having said that, after installing a G5, I was not sure if the system would still see the G3X LRU as the CAN bus termination point (as it initially was, with pin 28 jumped to CAN LO), or if the G5 should be the new termination point as it's CAN bus connection was just off the G3X connector and the lead is about 10" long.
The system did not like leaving the G3X as the termination point for the CAN bus. Easy fix, remove the pin 28 to CAN LO on the G3X LRU and install the CAN termination adapter on the back of the G5. Everything works.
This brings on the question, when the CAN bus was inoperative, I lost ALL CAN connectivity, engine monitoring, ADHRS, everything. So what would happen if in flight, you lost a ground on the CAN bus or the CAN bus was compromised i.e. cut, burnt, loose?
Would you lose everything? Even if you had a three screen system, with three ADHRS, they are ALL relying on the single CAN bus are they not??
Garmin G3X (370) with 400WAAS, GNC255, ADHRS, Eng monitoring, G5.
I have noticed from the beginning that the CAN bus can be finicky, i.e. you have to have the boxes all grounded together, early on Garmin said only ground the shield of the CAN bus at the two terminating ends, now their most recent guidance is to ground the shield at every CAN connection. And so on. Once you figure it out, it is simple though
When it is working all is good, and I have never had an issue.
Having said that, after installing a G5, I was not sure if the system would still see the G3X LRU as the CAN bus termination point (as it initially was, with pin 28 jumped to CAN LO), or if the G5 should be the new termination point as it's CAN bus connection was just off the G3X connector and the lead is about 10" long.
The system did not like leaving the G3X as the termination point for the CAN bus. Easy fix, remove the pin 28 to CAN LO on the G3X LRU and install the CAN termination adapter on the back of the G5. Everything works.
This brings on the question, when the CAN bus was inoperative, I lost ALL CAN connectivity, engine monitoring, ADHRS, everything. So what would happen if in flight, you lost a ground on the CAN bus or the CAN bus was compromised i.e. cut, burnt, loose?
Would you lose everything? Even if you had a three screen system, with three ADHRS, they are ALL relying on the single CAN bus are they not??