What was found
CAPTAIN REPORTED THAT DURING FLIGHT THE LIGHT OF 'AIRFOIL ICE PROTECT PRESS ABNORMAL' CAME ON, ALTHOUGH THE ANTI-ICE PROTECTION WAS SHUTOFF. AT MEX STATION, THE SYSTEM WAS VERIFIED AND IT WAS DETECTED THAT AFTER A SYSTEM ANTI-ICE CYCLE, THE MENTIONED LIGHT CAME ON. THE SWITCH S1-146 WAS REPLACED AND SYSTEM TESTED IAW MM 30-10-10, ALL CORRECT. (M)