As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CLIMB THROUGH FL270 THE CREW HEARD A "BANG" AND FELT A VIBRATION FROM #2 ENGINE, WHILE THE ENGINE WAS STILL MAKING POWER. AIRCRAFT RETURNED TO THE POINT OF DEPARTURE. INITIAL INSPECTION REVEALED A LOW PRESSURE TURBINE BLADE MISSING. THIS ENGINE SUFFERED A SIMILAR FAILURE ON 5 JANUARY 1990. THERE IS NO RECORD OF AN SDR AT THAT OCCURRENCE.