As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER TAKEOFF RED L 14TH STAGE DUCT MESSAGE. MESSAGE WENT OUT WITH AFFECTED THRUST REDUCED TO IDLE. INSPECTED 14TH STAGE LT NAC DUCT AND LOOP. FOUND NO PROBLEMS. CHECKED LOOP CONNECTORS WITH NO PROBLEMS. LEAK CHECKED LT 14TH STAGE NAC DUCT, NO LEAKS. OPERATED SYSTEM. OPS CHECK GOOD.