Hi flying the a350 and transponder says its off when i have it on all flight
I’m also experiencing the same problem with the transponder: In the A380, B789, and A35K. The transponder operates correctly, but the flight calculation always displays the same error. It also requests a TCAS light, which isn’t present on these aircraft.
ah okay, thought it was me going stupid haha
The same problem with Cessna 172 G1000 
I solved on G1000, by choosing ALT, not just ON. On the XPDR menu. At least on the C208 Caravan, haven’t tried on C172, but garmin should be the same.
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This was driving me crazy! Thanks for the solution. I had already given up on it.
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I suppose the ON activates Mode C (ALT) way after take off, while simfly clients start reading it on runway just before take off.
So now you can have the chance of 100/100 
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did you by chance find a fix for this? 
is this for the garmin or a350 in general? thanks
This hint is for garmin. Liners such as A350 have another avionic. Need to see if there’s a way to acrivate mode C from start at parking also from liners such as A350.
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Question.. do you use Vpilot client from vatsim? I saw a video, that enables ALT switching off STBY and than back on. From the SURV page. And on the vpilot client you can see mode C switching off and On.
Greetings, friends! So far, I’ve only been able to achieve 100/100 with the A21N and the B738. The transponders are controlled with a dial, and everything is perfect. But with all the other aircraft that have the digital controller, the avionics have been a problem. For example, on the A35K and A380, it deactivates for a few seconds, and SimFly’s flight analysis records this as a fault. I haven’t reported this because it has very little impact on PAX earnings; I think landing is much more important. Besides, the team has a lot of work ahead of us, which is of greater interest to us all.
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