I have the PC12 installed in FSX and P3D v2.4. At the first flight of the day in each platform I can open the pax door shft + E and the cargo door shft + E + 2, however after a flight and parked (battery still on) I can only open the pax door, using shft + E, if I use shft + E + 2 the pax door is closed, no way of opening the cargo door.

 

As previously posted this may be an issue with FSX Sp2, but the same occurs in P3D which has no service packs.

 

Any ideas as to cause would be appreciated.

Are you near a fuel location? That will prevent door operations sometimes in FSX. Dunno about P3D.

No, I'm aware of that issue not near any fuel.