As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORTED THE NR 1 ENGINE COWL ANTI-ICE BLUE LIGHT STAYED ON AFTER ENGINE SHUT DOWN, WITH THE SWITCH TURNED OFF. ACFT GROUNDED. RAN THE NR 1 ENGINE AT IDLE, LIGHT WENT OUT IMMEDIATELY, ALL OTHER INDICATIONS ARE NORMAL. IAW FIM 30-21 TASK 801.