What was found
(CAN) DURING CRUISE FLIGHT POWERPLANT MESSAGE POSTED. FLIGHT CREW OPTIONED TO RETURN TO DEPARTURE AIRPORT. ON GROUND FAULT CHECK REVEALED THE FOLLOWING FAULTS, NR 1 A CHANNEL 456,744 , 750 , 754, 755 B CH 456 , NR 2 A CHANNEL 30, 478, 456, 454, 10,711. TROUBLESHOOTING REPLACED NR 2 FADEC ACFT FUNCTIONED TESTED OK, RETURNED TO SERVICE. NO FURTHER ISSUES TO REPORT. (TC 20100219002)