Check on MFCD

Adjust the aerodrome pressure setter until the relative altitude on VSD page is calibrated to zero and check if the aerodrome pressure indicated by the aerodrome pressure setter is the same as that indicated by the barometric altimeter.

Enter STATUS page:1—IDCS,3—HNS,4—HADS,6—EPU

Enter DATA page:1—HNS,2—HADS,6—EPU,9—TANK,10—IDCS

Check if all the systems and devices above are working normally.