What was found
ABOUT 25 MINUTES INTO FLIGHT, RECEIVED A RT ENGINE OVERHEAT EICAS MESSAGE & RT ENGINE OVERHEAT LIGHT. COMPLIED WITH QRH AND LIGHT WENT OUT AFTER ABOUT 3 MINUTES WITH RIGHT THRUST LEVER AT IDLE. ALL ENGINE INSTRUMENT INDICATIONS WERE NORMAL. LANDED WITH RIGHT ENGINE AT IDLE. PERFORMED PNEUMATIC BACK PRESSURE LEAK CHECK ON THE NR 2 ENGINE IAW MM 36-11-00-5, FOUND A LEAK AT INTERMEDIATE PRESSURE CHECK VALVE. REMOVED AND REPLACED BOTH COUPLINGS AND E-SEALS ON VALVE IAW MM 36-11-06-04-1. ALSO INSPECTED HP2 ,HP6 VALVES AND DUCTING IAW MTSI. NO REPEATED LEAKS NOTED ON THE NR 2 ENGINE.