What was found
R ENGINE OVERHEAT REPEAT WRITE UP. T/S REF. B757-3 FIM 26-11 FAULT TREE 802. ENG. 2 OVER HEAT LOOPS 1 & 2 ARE WITHIN LIMITS PER TABLE 101 OF FIM. REF LOGPAGE 3129533 FOR PRIOR T/S OF RH ENG OVHT PERFORMED FIM 26-11 FAULT TREE 803 FROM FAULT ISOLATION BLOCK BLOCK 10 TO COMPLETION OF FIM TASK, SYSTEM TEST PASSED. FURTHER TROUBLESHOOTING REQUIRED AT THIS TIME, POWERPLANT ENGINEERING. PRESSURIZED #2 ENG PNEUMATIC SYSTEM UPSTREAM OF PRSOV REF AMM 36-11-09, FOUND LARGE LEAK AT INTERMEDIATE CHECK VALVE BETWEEN Y DUCT AND PRECOOLER. DIASSEMBLED AND FOUND E-SEAL DAMAGED. REPLACED BOTH E-SEALS AND CLAMPS. REINSTALLED CHECK VALVE REF AMM 36-11-06. PRESSURIZED SYSTEM AGAIN NO FURTHER LEAKS. PERFORMED ENG RUN WITH NO FAULTS NOTED. OK TO CONTINUE.