What was found
SMF-ON FLIGHT NUMBER 2456, FLIGHT DIVERTED TO SMF FROM SJC-BOI DUE TO A LEFT BLEED DUCT WARNING. DECLARED AN EMERGENCY. CRF WAS CALLED, LEFT BLEED DUCT WARNING (RED) CAME ON AND REMAINED ON FOR MORE THAN 60 SECONDS (3 MINUTES TOTAL). FOUND BLEED LEAK AT INLET OF LEFT HAND COWL ANTI ICE VALVE. REMOVED AND REPLACED LEFT HAND COWL ANTI ICE VALVE, ALL CHECKS GOOD, NO LEAKS NOTED. AIRCRAFT LANDED WITHOUT INCIDENT AND PASSENGERS WERE ALL ALRIGHT. AIRCRAFT RETUNED TO SERVICE.