What was found
ON TAKEOFF L ENG BLEED EICAS MSG. PERFORMED FIM 36-10 FAULT TREE 811 PERFORMED PREVIOUS FLIGHT TAKEOFFS BLEED PARAMETERS READOUT AND NO ABNORMAL INDICATIONS FOUND AT THIS TIME.AS PRECAUTION REPLACED LEFT AIR SUPPLY THERMAL OVERTEMP SWITCH AS PER AMM 36-22-01-400-801.REQUIRES RUN TO VERIFY BLEED INDICATION AT T.O. LEFT ECS BAY PERFORMED ENGINE RUN ON # 1 ENGINE. BLEED "OFF" LIGHT CYCLES INTERMITTENTLY. REMOVED AND REPLACED # 1 ENGINE RFCC AS PER MM 36-11-18-004-001/414-017 UP TO AND INCLUDING PARA F(16). NEED TO COMPLETE FROM PARA G OF MM36-11-18-414-01 COMPLETE INSTALLATION OF #1 ENG. RFCC FROM PARA G TO END OF MM 36-11-18-414-017 . #1 ENGINE BLEED OPS CHECK GOOD