What was found
ON FLIGHT 2897 E2 INLET OPEN INSCRIPTION WAS ON DURING TAXI AND TAKEOFF. AS THEY APPROACHED 10 C THEY SELECTED OVERIDE KNOB TO ALL PER MEL 30-24 ALL ANTI-ICING VALVES INDICATED OPEN. CLIMBING THROUGH MID 20,S THEY GOT AN E-2 ANTIICE FAIL MESSAGE. E2 INLET OPEN HAD GONE OUT. THE CREW DECLARED AN EMERGENCY IN ORDER TO DESCEND AND EXIT ICING CONDITIONS. HAVING DECLARED AN EMERGENCY THEY RETURNED TO DFW AND LANDED AT 42,700LBS. PERFORMED BENCH TEST OF E2 A/I PRESSURE TRANSDUCER IAW KULITE CMM 30-21-06. FOUND TO BE FAULTY. REMOVED AND REPLACED THE TRANSDUCER IAW EMB 140 AMM 30-21-06. OPERATIONAL CHECK GOOD, NO MESSAGES OCCURRED. THE AIRCRAFT WAS RETURNED TO SERVICE.