Regional Jet 700 ER/LR (CRJ700)
Aircraft Equipment Problem Critical
Flight Crew Diverted; Flight Crew Landed in Emergency Condition
Aircraft; Procedure
Flight was [delayed] due to maintenance. When a plane was finally established for [trip #]; I found that it had a LONG history of ADC 1 and 2 failures over the past few days.  I spent a LONG period of time on the phone discussing the issues I had with the aircraft and after a 3 way phone call with [Chief Pilot]; it was agreed that he shared my concerns; but it was signed off airworthy.  I accepted the flight.  After Take off; at approximately 5-600 feet; both ADCs failed and air data went blank on both PDCs.  We were able to re-acquire ADC1 (probably)...and returned...for normal landing in gusting winds.  It is my belief that continued behavior to reset systems with recency of failure problems and return them to line service will have a disastrous outcome.
A CRJ700 Captain expressed concerns about taking an aircraft with a long history of ADC failures. On takeoff; ADC 1 and 2 failed and the aircraft returned to departure airport.