As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO DFW DUE TO THE FLIGHT CREW REPORTING THAT WHILE IN CLIMB, PASSING APPROX FL180, ECAM READ AIR ENG 1 BLEED LEAK - THE FLIGHT CREW EXECUTED ECAM ACTIONS THE AIRCRAFT LANDED SAFELY AT DFW AND TAXIED TO THE GATE UNDER ITS OWN POWER - MAINTENANCE REPLACED THE PYLON OVERHEAT SENSING ELEMENT AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 36-22-15