Originally Posted by
Centaurus
So much personal opinion is taught as a technical fact that you don't know where the bulls#t starts and stops
True, however there is also common sense. Recall a certain A340-300 out over the GAFFA that the FO decided to balance the fuel tanks, and used all of his fingers at the same time to switch the fuel system configuration, which was fine, except he got the hydraulic switches instead. Not a big deal even then, until the pumps were all turned back on at the same time, but with the lag of realisation, where the FCC's had already demanded full deflections due to the non response to the slight corrections that were required. With hyd pressure, people went flying across the cabin in an untidy heap, with many injuries. Flicking multiple switches at the same time is great if your mind parallel processes, which the human mind doesn't necessarily do well at all. Back at the beginning of the B777 program TBC's own trainers were averse to multi switch flickers, even though the preamble, and procedures did not speak against the practice. Times change, but common sense has a place at the table.