As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT 14TH DUCT WARNING WITH SYS OFF, RED FLOW BAR ON LT COWL/PYLON. FOLLOWED QRH AND MSG DID NOT EXTINGUISH. DIVERTED, DECLARED EMERGENCY. HOT AIR LEAK COMING FROM FWD OF THE LT PACK. THE HOT AIR IS BLOWING ON THE 14TH STAGE LOOP CAUSING WARNING MESSAGE. R & R LT PYLON 14TH STAGE BLEED-AIR SENSING ELEMENT A59WK. OPS CHECKED GOOD IAW AMM.