Originally Posted by
Learningtofly85
Thanks everyone for the information.
One more doubt.
In normal operations the airspeed indication on ISIS is supplied by ADR 3?In case of unreliable airspeed ,the cross check with ADR 3 speed is done by directly reading it from ISIS or I have use the switching panel to see ADR3 airspeed on either PFDs?
ISIS gets standby Pitot/staic pressure direct without going through ADM. ADR 3 gets also gets through same source but through ADM. You can check even by switching also directly from ISIS.