Do we know that Mr Snodgrass ever did a pre-flight before climbing into the cockpit. Although he was long time out of the military and commercial ops; when the pilot never does more than a quick walk round. Had he expected someone else to have carried out the pre-flight and maybe they had or perhaps normally did. Of course, the simple full and free movement of the controls during taxiing ,even when running late causes no loss of time, so this accident strikes of dreadful complacency.
Some years ago when rock climbing from school our instructor emphasised self checks; he said; “one mistake frightens the living day-lights out of you which you will never forget, two mistakes will require all you training and skills but three errors are unrecoverable”. that fact remains with me 60 years on. When has there ever been a serious accident with less than three elements. There is a lot more to know of this flight.