As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM: ENG NR 2 "COWL ANTI ICE" LIGHT COMES ON AT HIGH THRUST SETTING AND GOES OFF AT REDUCED THRUST. CHECKED & CLEANED CONNECTORS ON OVERPRESSURE SWITCH & COWL ANTI ICE VALVE IAW AMM 30-21-11. CHECK GOOD. RAN NR 2 ENG AT PWR 3 TIMES COULD NOT DUPLICATE DISCREPANCY WITH NR 2 COWL ANTI ICE IAW FIM 30-21 TASK 809. INTERMITTENT FAULT.