As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - ON CLIMBOUT LEFT HYDRAULIC PRESS LOW AND LEFT HYDRAULIC TEMP HI LIGHTS ILLUMINATED. EMERGENCY DECLARED, LANDED DFW WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND POWER TRANSFER UNIT INOPERATIVE. REPLACED POWER TRANSFER UNIT. SYSTEM GROUND CHECKED NORMAL OPERATION.