As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ROTORCRAFT SUFFERED AN UNCONTAINED TURBINE FAILURE CAUSING DAMAGE TO AIRCRAFT. NR 2 ENG FAILED AND TURBINE WHEEL ENTERED TAILBOOM TUNNEL CAUSING A 9 INCH TEAR IN CENTER OF FIRE WALL. HIT NR 1 T/R DRIVESHAFT HANGER BEARING SUPPORT, RIPPED MOUNTING. WHEEL THEN HIT NR 1 ENG AIR DISCHARGE TUBES. AIRCRAFT WAS ON HELIPAD READYING FOR TAKEOFF.