What was found
NR 2 ENGINE ANTI-ICE COWL VALVE OPEN LIGHT STAYS BRIGHT WHEN ANTI-ICE ON. GOES OUT WHEN ANTI-ICE OFF. ACFT GROUNDED. PERFORMED OPS CHECK OF NR 2 ANTI-ICE COWL VALVE AND FOUND IT TO BE OPERATING NORMAL, NO DEFAULTS & NO HISTORY. PERFORMED OPS CHECK OF NR 1 ENG ANTI-ICE COWL VALVE AND FOUND IT INOP. PERFORMED FIM TASK 30-21 TASK 805. NR 1 ANTI-ICE COWL VALVE STARTED WORKING NORMALLY. OPERATED BOTH NR 1 & NR 2 ANTI-ICE COWL VALVE WITH NO DEFAULTS. COWL VALVE LIGHT OPERATES NORMAL. POSSIBLE INTERMITTENT FAULT. OPS CHECKS NORMAL, NO HISTORY 30 DAYS.