Hi Millsy,
I have yet to receive a P100 back from a customer with anything like this issue I am pleased to say. My very first P100 which was pre production did seize on a run up to full power, but that was a catastrophic failure which the factory dealt with and it was before production turbines were hitting the shelves. Sorry, I can't shed any light on your issue. I guess its just a case of waiting for the guys at JC to get back to you.
Regards Al