During the start sequence, engine master lever on feather the propellers must remain in feather and change position when switching to « RUN » and propellers noise increase.

When engines starting, the engines start too quickly compared to the real plane the same thing for the engine cut, the propellers stop turning too fast.

 

In the simulation it is possible to start the 4 engines at the same time. What is not possible in real life. It’s starter air valve not an electric starter like the B787. 

To power the APU with fuel you need FEED TANK 3 and 4. 

For the alignment of the IRS it is with the pushbutton "GARDIRS" next to the hydraulic pushbutton. IR pushbuttons must be pushed before but it’s GADIRS which activate the alignment. 
 

In night flight the cockpit is not dark enough as in the A320neo or A321 Inibuilds. 

Engines can currently start without fuel pumps activated. it's impossible on the real aircraft.