What was found
(CAN) AFTER TAKEOFF, THE CREW OBSERVED A SUDDEN LOSS OF POWER ON NR 2 ENGINE COINCIDENT WITH AN UNUSUAL VIBRATION AND NOISE. THE CREW CARRIED OUT AN INFLIGHT SHUTDOWN OF NR 2 ENGINE. THE ACFT RETURNED TO POINT OF DEPARTURE AND LANDED WITHOUT FURTHER DIFFICULTY. MX INVESTIGATION CONFIRMS A TURBINE FAILURE EVENT. THE ORIGIN OF THE FAILURE IS UNKNOWN AS TO WHETHER THE INITIATION POINT WAS IN THE HPT OR LPT. NOTE TIME IN SERVICE SINCE REFURB(NOT O/H) IS 7100HR AND 4300CY BUILD SPEC IS 10,000HR/6000CY.