What was found
BNA - INFLIGHT DCA-DFW. ICE PROTECT PRESSURE ABNORMAL LIGHT ILLUMINATED. EMERGENCY DECLARED, LANDED BNI WITHOUT INCIDENT. REPLACED PRESSURE REGULATING VALVE. SYSTEM GROUND CHECKED NORMAL OPERATION.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
BNA - INFLIGHT DCA-DFW. ICE PROTECT PRESSURE ABNORMAL LIGHT ILLUMINATED. EMERGENCY DECLARED, LANDED BNI WITHOUT INCIDENT. REPLACED PRESSURE REGULATING VALVE. SYSTEM GROUND CHECKED NORMAL OPERATION.