Dash 8 Series Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Human-Machine Interface
Aircraft Equipment Problem Critical
Flight Crew Landed As Precaution; Flight Crew Returned To Departure Airport
Aircraft; Equipment / Tooling
On the climb out we first had an Attitude Direction Indicator (ADI) roll mismatch; followed by Horizontal Situation Indicator (HSI) roll mismatch. We then lost both of our yaw dampers and flight directors and also had an AHRS data invalid message. At this point we decided to return to the airport.
Aircraft experienced multiple failures preventing IMC flight. After takeoff returned to field.