Nothing in aviation is foolproof. I would be the last to claim any foolproof analysis skills. In training I merely seek to get pilots thinking outside the square.
A Yank I knew many years ago worked out that Fokker's emergency gear extension drill for the F 27 could fail to do the job under certain circumstances. He wrote to Fokker about it, and offered an alternative procedure. They ignored it. I did not ignore it and in a memo advised my pilots to consider this guy's unofficial drill if the approved drill failed because it made so much sense. Sure enough, one day an aircraft had a problem with the pneumatics and the gear would not come down using the approved procedure. So the pilot did the unofficial drill. It worked.
Last edited by Mach E Avelli; 2nd Aug 2015 at 10:34.