As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT JETPIPE OVERHEAT CAUTION ON TAKEOFF, THEN ON DESCENT LEFT JETPIPE OVERHEAT WARNING CAME ON AND WOULD NOT EXTINGUISH. DIVERTED TO LAX. CREW SHUTDOWN LEFT ENGINE DURING DESCENT. (FLT 5197) FO: 10/15/2018 CLOSED REMOVED AND REPLACED LT PYLON LOOP B ELEMENT IAW AMM. OPS CHECK OF ENG FIRE/OVERHEAT-DETECTION SYSTEM IAW AMM. OPS CHECK GOOD.