What was found
DFW - FLT 1035 - EN ROUTE DFW-AUS - MASTER WARNING AND ASSOCIATED TAIL COMPARTMENT TEMPERATURE HIGH LIGHT ILLUMINATED. DID IMMEDIATE ACTION ITEMS AND LIGHT EXTINGUISHED WHEN AIR CONDITIONING SUPPLY SWITCHES MOVED TO HIGH PRESSURE BLEED OFF. RETURNED AND LANDED DFW WITHOUT INCIDENT. INSTALLED NEW HEAT EXCHANGER CLAMP. LEAK CHECKED GOOD. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)