Precision Flight Serial CAT I and Microsoft Flight Simulator 9 (2004) - Manual (Page 10)

Set Up Guide for Serial CAT1 and FS2004 Page 10
C. Enable and Calibrate Main Flight Controls
NOTE:
If you do not have PFC Yoke and Pedals or if your PFC Yoke and Pedals are connected to the
USB port on your computer, you will skip Section C and proceed to Section E.
C1. Enable main flight controls
1. Press the ALT key on your keyboard and choose PFC.
2. In the Precision Flight Controls window, choose Flight Controls.
3. In the Flight Controls tab enable the Elevator and Aileron, by clicking on the enable box
which is opposite of the F for filter box.