As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CLIMB RECEIVED A LEFT ANTI ICE CAUTION MESSAGE, THEN A LEFT JET PIPE MASTER CAUTION MESSAGE AND AFTERWARDS A LEFT JET PIPE OVERHEAT MASTER CAUTION. COMPLIED WITH QRH. RETURNED TO FIELD. LANDING WAS ROUTINE. (FLT 5639) FO: 10/11/2018 CLOSED REMOVED AND REPLACED LT 14TH STAGE DUCT AND 14TH STAGE SOV IAW AMM. NO LEAKS NOTED.