Thanks for the replies. Its the latest premier version of the Mohawk (PS3) from 2019 catalog.
The first repair was that the engine would not startup in any mode. Was trickle of sound initially but then nothing.
After that repair, I discovered during PSA activation this sound issue. Initially it did not happen every time. Now after this last return it happens each time I run the sequence. And actually it is consistent in that either segment 1 or 2, cannot remember which one, that the one step in the sequence does not screech. So very reproducible results as I ran through the PFA 6-7 times.
When I received the fed ex notification and checked online in the service portal, I saw that in the notes there were no issues found and reset completed for safe measures.
I immediately called to make sure that they tested it and they confirmed on the phone there were no issues and noted the PFA.
So now that this would be third time and now shipping back across the states I have lost some patience in sending back and forth.
I initially thought that it was something that I was doing but I do not experience this with any other engine (PS3).