What was found
CREW REPORTED THE E2 ANTI ICE FAILED TO STAY OPEN IN NON ICE CONDITIONS. REPORTEDLY STAYED ON FOR A FEW MINUTES, THEN TURNED OFF ON ITS OWN. ACFT RETURNED & LANDED WITHOUT INCIDENT. MX REMOVED AND REPLACED THE ENGINE TWO ANTI-ICE VALVE, AND PRESSURE TRANSDUCER, OPERATIONALLY TESTED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.