As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
14TH STAGE BLEED ISSUE. FLIGHT IS RETURNING WITH AFFECTED NR 1 ENG AT IDLE POWER. EMER WAS DECLARED IN FLIGHT. LANDING & TAXI TO THE GATE WAS NORMAL. LT 14TH DUCT WARNING MSG WHILE IN FLIGHT. QRH PROCEDURE COMPLIED WITH. REPLACED PYLON SENSE ELEMENT A59WK IAW AMM 36-21-04. COMPLETED OPERATIONS TEST IAW AMM 36-21-10. ALL CHECKED GOOD.