What was found
AIR TURN BACK. RT ENGINE SYSTEM FAILED, LT ENGINE SYSTEM FAILED ON CLIMB. PERFORMED FIM TASK 77-22-801, NR 1 ENGINE NO DEFECTS, NR 2 ENGINE TURBINE OVERHEAT CHN A/B DISAGREE, R & R TURBINE BEARING OVERHEAT DETECTOR THERMOCOUPLE IAW AMM 77-23-01, OPS GOOD, NO DEFECTS NOTED. REPLACED THE NR 1 FCC IAW AMM 22-01-03, OPS CHECKED OK. ACCOMPLISHED RTS OF NR 2 FCC IAW AMM 22-00-00, NO FAULTS. OK FOR SERVICE.