What was found
DFW - FLT 1507 - EN ROUTE DFW-YVR - ON TAKEOFF, TAIL COMPARTMENT TEMPERATURE HIGH LIGHT ILLUMINATED. ACCOMPLISHED EMERGENCY PROCEDURE, DECLARED EMERGENCY AND LANDED DFW WITHOUT FURTHER INCIDENT. INSTALLED NEW DUCT ASSEMBLY IN AFT ACCESSORY COMPARTMENT, PERFORMED HIGH PRESSURE DUCT LEAK CHECK. NO LEAKS NOTED. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)