What was found
RIGHT AIRVALVE LIGHT ILLUMINATED IN FLIGHT, CREW PERFORMED QRH LIGHT EXTINGUISHED AND CAME BACK ON. RETURNED DUE TO ICING CONDITIONS REPLACED AIRVALVE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
RIGHT AIRVALVE LIGHT ILLUMINATED IN FLIGHT, CREW PERFORMED QRH LIGHT EXTINGUISHED AND CAME BACK ON. RETURNED DUE TO ICING CONDITIONS REPLACED AIRVALVE.