Q: How can I open cockpit door, baggage area door or engine cover?
A: Cockpit door can be opened using standard "Select exit" function (Shift+E for pilot door, Shift+E,2 for copilot door - default setting IIRC), engine cover is connected to "Wing fold/unfold" function and baggage area door is assigned to "toggle spoiler" function.
Check your FS key assignments to see which keys you need to use for those functions.
