Hi,I was wondering if I have to use the FMC while using FS2Crew. I am very new with the pmdg and still dont understand the FMC. Everytime I takoff and call flaps the fo wont arm vnav, when I call lnav he wont arm it. ( if he arms lnav will the plane naigate according to my gps??) And my vertical speed indecator is blank ( is this normal???) Please help.Best RegardsAlex

Hello Alex,You do not need to use the FMC with FS2Crew for the PMDG 737NG, although for certain autopilot functions to work the FMC needs to be set up properly (as you've already discovered).I suggest going into the file library here at Avsim and downloading the PMDG737 tutorials; there are many of them available.The FMC is the heart of the PMDG 737NG, and it is worth taking the time to learn.Cheers,Bryan