What was found
TAIL COMPARTMENT HI LIGHT CAME ON AT 140 KNOTS ON TAKEOFF ROLL. LIGHT WENT OFF AFTER QRH PROCEDURE AND 30 SECONDS THEN ON AND OFF FOUR TIMES PRIOR TO LANDING. RESECURED SEALS ON RIGHT HEAT EXCHANGER, SECURED AUGMENTOR VALVE CLAMP. REPLACED APU EXHAUST DUCT, RUN ENGINES LEAK CHECK GOOD IAW MM 49-80, AND 21-51-4.