What was found
AIRCRAFT WAS GNDED. AIR INTERRUPT, EMER DECLARED, LANDING UNEVENTFUL & ACFT NOT OVERWEIGHT. DURING CLIMB, WITH AIR FOIL ANTI-ICE OFF THE TAIL COMPARTMENT, TEMPERATURE HIGH LIGHT ILLUMINATED. FOUND WATER SEPARATOR TO CHECK VLV DUCT DAMAGED. R & R DUCT IAW AMM 21-20-01.