From my 1st post it could easily be construed that I believe the accident was due to a CB being pulled. That would be a very unfair assumption from my part. However from Wing1011s excellent post it seems there is a workaround to complete a daily which very nearly helped write off a serviceable aircraft with the loss of all onboard. Thats why those aircraft should be modified. In this accident my gut feeling is that there will be a lot of human factor issues involved. (I truely hope not). It is down to us & the authorities/manufacturers to learn & improve safety from them!