As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CREW GOT L 14TH DUCT MESSAGE. MESSAGE WAS INTERMITTENT AT FIRST. EVENTUALLY, MESSAGE WENT TO STEADY STATE. CREW FOLLOWED QRH 6-2 THEN ABNORMAL 1-2. THEY LANDED AT THE NEAREST SUITABLE AIRPORT. MAINTENANCE WAS SENT. REPLACED THE LEFT LEAK SENSING ELEMENT IN THE LEFT PYLON. GROUND RUNS AND OPS CHECKS CARRIED OUT WITH NO DEFECTS.