Not if you're already a permanent, full time Flight Attendant with a QF subsidiary (Eastern, Sunnies and the Pulse).
If I were ever asked to become a 3 year fixed termer, I'd politely decline the offer. I don't do 3 year long interviews.
I'll get there by progression if I'm not offered full time - might take me a while, but at least I'd be permanent. No guarantee of that as a fixed termer.
And I should know - we have a few former fixed termers working with us.