Originally Posted by rickair7777

This one is complicated too. In the old days I'd say you're 100% good, just file an ASAP and you'll never hear about it again.

But busy TRACONs got some upgrades a few years back. One of them is precision radar and my understanding is that 300' off altitude is enough to trigger the alarm. Once the alarm is triggered, the sup HAS to do *something* about it (it gets recorded)... my understanding is that they may not be able to just call it good. Somebody has to get a deviation (pilot) or error (controller).

A good sup would of course lay the blame where it needed to go. But possible the controllers might circle wagons and give you the deviation since you switched freq and code.