Bonanza 35
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Flight Instructor
Flight Crew Last 90 Days 5; Flight Crew Total 5670; Flight Crew Type 43
Situational Awareness; Workload; Distraction
Deviation / Discrepancy - Procedural Published Material / Policy; Ground Incursion Runway
Air Traffic Control Issued New Clearance; Flight Crew Became Reoriented; Flight Crew Took Evasive Action
Equipment / Tooling; Human Factors
Cleared to taxi from parking ramp to [Runway] XX via Echo and Delta; cross Runway XY.  I began the short taxi out Echo to Delta.  The turn onto Delta is about 45 degrees to the left and that taxiway intersection is about equal distance from XY; which is to the left on Delta and which I was cleared to cross; and XX which was straight ahead on Echo.  I had my iPad in my lap with the taxi diagram displayed.  I believe that as I entered the taxiway intersection; the runway warning activated on the iPad causing me to look down at the iPad taxi diagram right about when I should have been turning.  I looked back up and realized I had gone through the intersection and; I believe; across the runway hold line for XX but short of the actual runway.  I stopped immediately and Ground Control cleared me to continue to taxi onto XX; make an immediate turn to the left onto XY; and then right on Delta to continue to XX.  There was no loss of separation or conflict with other traffic. I should not have looked down at my iPad taxi diagram at that time; but the safety warning of runway proximity with two runways in the immediate vicinity was distracting.  While I should have concentrated on the taxiing; it also does not seem right to not look at electronic safety guidance when it is issuing a warning.  It was further complicated by the fact that I knew I was in the immediate vicinity of a runway that I was cleared to cross.
A BE-35 pilot was distracted to view his iPad's runway warning alert and so as he looked away from his external environment crossed a runway hold short instead of turning onto the taxiway in his clearance.