As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURN BACK DUE TO LEFT PYLON BLEED LEAK DURING CLIMB. CREW RAN QRH, SHUT DOWN ENGINE, DECLARED EMERGENCY, AND LANDED WITHOUT INCIDENT AT KDAL. REMOVED AND REPLACED LEFT ENGINE INTERMEDIATE PRESSURE VALVE, IAW CL 300 AMM 36-11-05. P/N OFF/ON A0250102-9.