Onceapilot - getting a little touchy? You obviously have never been involved in maintaining Tristars - I have and I think I am a little more qualified to comment on their problems than you. I have held maintenance engineers licences - starting with the ARB,Then CAA,FAA A&P finally Easa, from 1965 until 2010 when I retired.There is a world of difference between flying an aircraft and maintaining it.I would not be so arrogant as to comment on a large aircrafts flying characteristics as I only ever had a PPL.