What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO DFW DUE TO THE FLIGHT CREW REPORTING WHILE PASSING 2000 FT, AN ANTI-ICE FAULT ECAM MESSAGE FOR THE CAPTAINS AND FIRST OFFICERS STANDBY PROBES DISPLAYED. THE FLIGHT CREW ACCOMPLISHED ECAM PROCEDURES AND TURNED OFF ADR 2 PB AND SWITCHED AIR DATA FO FO 3. THE FLIGHT CREW REPORTED THAT THEY WERE UNABLE TO STAY OUT OF THE CLOUDS AND RETURNED TO DFW WHERE THE AIRCRAFT LANDED SAFELY WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE #1 PROBE HEATER COMPUTER AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 30-31-34.