What was found
(CAN) PILOT REDUCED POWER TO IDLE AT TOUCHDOWN, HE NOTED PROP RPM DECAY BELOW NORMAL. ENGINE LOW OIL PRESSURE LIGHT ILLUMINATED, PROP THEN STOPPED TURNING BUT DID NOT FEATHER. PILOT CARRIED OUT SHUTDOWN PROCEDURE. ACFT WAS TOWED FROM RUNWAY. INITIAL INSPECTION FOUND PROP WOULD NOT ROTATE BY HAND, METALLIC DEBRIS WAS FOUND IN EXHAUST STACKS. LOOKING INTO EXHAUST IT WAS FOUND THAT 1 TURBINE BLADE WAS BROKEN MID CHORD. BORESCOPE INSPECTION REVEALED ALL COMPRESSOR TURBINE BLADES BROKEN OFF AT VARIOUS LENGTHS WITH JAGGED EDGES. ENGINE REMOVED AND SHIPPED TO PREMIER TURBINES GE USA FOR TEARDOWN INSPECTION.