Hi Richard.
Interesting question, but a bit more information would be helpful.
What type of bird? How old was it when it was pulled or taken from the chamber/nest?
How was it imprinted?
With accipiters that I have imprinted, screaming, if at all, only lasted a short time. No more than a week or so. Some were "vocal" for a time, especially in the moments before each hunt, but this was far from screaming and only lasted until they were made to game.
So give us a bit more information and lets see how this pans out!
Best Regards,