Originally Posted by Lonewolf_50
You really have to know your system, exercise that knowledge, and keep up with all of the little technical changes and nuances. Quite literally, your life and that of your passengers/crew depends upon a detailed and deep grasp of your entire aircraft systems package. As aircraft get more complex, systems-wise, the demand for this knowledge goes up, not down.
Paradox is the Manufacturer wants you to know the bare minimum – Always go back to the Mr Ziegler’s concierge ...
But the airplane is so complex when you start scratching the surface. Official reports bring more information than FCOMs, especially if they are not under the BEA leadership.