Agree with Rat!
Considering the fact that 75% of aviation accidents are directly related to human factors, pilots should make every effort to respect procedures established by the manufacturer and airline SOPs
That is an interesting introduction when actually studied. I despise the "accidents are related to human factors" argument. It is true.....but it is only a tiny portion of the Truth. So human factors also contribute greatly to traffic accidents, but human factors AVOID the open manhole cover, the diesel spill on the road, the wet leaves in the bend, the fool running the red, the blown tyre. Of course, all the incidents and accidents AVOIDED due to airmanship and ability, "wisdom," are totally ignored in the introductory statement, which is why I get so irritated by hearing it.
There is also an assumption that SOPs improve that human factor ratio. They are a tool and used properly, reduce stress, as they are ingrained procedures, like tying a shoelace, using the clutch and changing gears in a curve on a motorbike (try writing a procedure for either of these activities) BUT use with wisdom.......... One of my "pet" peeves, although a minor one, is that our checklist calls for the "nav lights "on" before APU start. Our NAV lights have no power on batteri, so selecting them "on" is useless, as they will not come on anyway. Selecting them on however, and then selecting the generator on after APU start, blows especially the tail NAV lamps after a short time. Some sort of surge as the generator comes on line. So I deviate from the order of the checklist to selecting the NAV lights on AFTER APU generator on line.
You would be amazed at the FOs who almost cannot sit still at this horrible deviation!
Yet the same FO would depart with an "open door" warning(!) "Donīt you think it is a false message?" or descend below MDA towards a mountain on an island, because he had intermittant ground contact directly below..... not wise........