What was found
DFW - FLT 1233 - AFTER TAKEOFF TAIL COMPARTMENT OVERHEAT LIGHT ILLUMINATED WITH MASTER WARNING. ANTI-ICE WAS OFF. ON THROTTLE BACK, LIGHT EXTINGUISHED, BUT ILLUMINATED AGAIN ON THROTTLE UP. APU WAS OFF AT THE TIME. AIR INTERRUPTED RETURNED TO DFW AND LANDED WITHOUT INCIDENT. REPLACED TWO CLAMPS ON RIGHT PRESSURE REGULATOR. INSPECTION OF DUCT AND VALVE FOR CRACKS, CHECKED GOOD. ACCOMPLISHED LEAK AND OPERATIONS CHECK AT ENGINE RUN UP. HAD NO OVERHEAT LIGHT. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)