As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COWL VALVE OPEN LIGHT STAYS ON BRIGHT WHEN THE ENG ANTI-ICE SWIT CH IS MOVED TO ON ENG-1 ENG1 COWL VALVE OPEN LIGHT STAYS ON W AMBER TAI ON MFD WHEN AI S ELEC TED ON REMOVED E1 COWL ANTIICE VALVE SN 1365C AND INSTALLED A NEW SERVICEABLE VALVE SN 875C PER AMM TASK 30-21-11-400-801. OPS CHECKED GOOD.