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) WORK IN PROGRESS AWAITING FUNCTIONAL FLIGHT.