What was found
AFTER GO AROUND, ECU 1 FAULTED. ECU 1 WAS TURNED OFF IAW QRH. ON BASE TO FINAL, LT TORQUE WENT TO 100% & LT NP WENT INTO CAUTION, NR 1 ECU. CLEANED CONNECTOR, PERFORMED ENG RUN-UP & FOUND TO BE OK IAW MM JIC 73-23-61 RAI 10000. AFTER INITIAL DISCREPANCY CORRECTED, CREW STATED THEY MIGHT HAVE EXCEEDED EXTENSION LIMITS FOR LG & FLAPS. PERFORMED FLAP & LG EXTENSION OVER SPEED INSPECTIONS IAW MM. IAW DFDR DOWNLOAD IT WAS DISCOVERED NR 1 ENG HAD SUSTAINED AN OVER TORQUE OF 126.2% FOR 41 SECONDS. PERFORMED ENG & PROPELLER OVER TORQUE INSPECTIONS IAW MM. NO FURTHER DISCREPANCIES FOUND.