What was found
AIRCRAFT WAS GROUNDED: ANTI ICE CAPT LEFT STATIC AND RIGHT STATIC CAUTION MESSAGE ON ECAM DURING CLIMBOUT. CREW FOLLOWED ECAM PROCEDURE AND CAPTAIN ALTIMETER READ 30,300 WITH FIRTD OFFICERS ALTIMETER AT 30,000, AND STAND BY ALTIMETER READ APPROXIMATELY 29,700. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO DFW WHERE IT LANDED SAFELY WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED PROBE HEAT COMPUTER #1 PER AMM 30-31-34 (AALA202212055868) AND #3 AIR DATA MODULE PER AMM 34-11-17. (AALA202212052875) A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.