As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DUCT AIR FLASHING LIGHT ILLUMINATED. LOOKED ON OVERHEAD PANEL AND SAW DUCT FAIL LIGHT ILLUMINATED. TURNED BOTH 14TH STAGE VALVES OFF ACCORDING TO CHECKLIST AND LIGHT STAYED ON. PULLED #2 ENGINE TO IDLE AND LIGHT DID NOT EXTINGUISH. RETURNED #2 ENGINE TO FULL POWER AND THEN RETARDED #1 ENGINE TO IDLE RED DUCT LIGHT EXTINGUISHED FOR ABOUT FOR ABOUT 2-3 SEC. AND CAME BACK ON. PERFORMED PRECAUTIONARY #1 ENGINE SHUTDOWN. RED DUCT FAIL LIGHT IMMEDIATELY WENT OUT.