As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT RETURNED TO DEPARTURE DUE TO LT ENGINE INDICATIONS. TURNED OFF ANTI-ICE, FELT SHUDDER, HEARD BANG AND THEN NOTED LT ENGINE EPR DROP AND EGT RISE AND THEN STABILIZE. MX FOUND TURBINE DAMAGE, METAL IN TAIL PIPE. ALSO PIECE OF TURBINE BLADE PUNCTURED CASE BUT WAS CONTAINED IN ENGINE COWLING. MX REPORTED THAT NO METAL WAS FOUND IN THE ENGINE COWLING. ENGINE WAS NOT SHUTDOWN. ENGINE WAS CHANGED.