What was found
(CAN) THE ACFT WAS TAXIED TO RUNWAY AND DURING THE INITIAL APPLICATION OF POWER FOR TAKEOFF, A POPPING NOISE, ALONG WITH A SLIGHT SHUDDER WAS FELT. TAKEOFF WAS REJECTED IMMEDIATELY AND ACFT RETURNED. MAINTENANCE CONSULTED AND BACK UP ACFT DISPATCHED. MAINTENANCE FOUND CATASTROPHIC ENGINE FAILURE INTERNALLY. PROP SEIZED, CAUSE UNKNOWN UNTIL ENGINE O/H SHOP DISASSEMBLES THE ENGINE FOR O/H. RESULTS ESTIMATED IN 2-4 WEEKS. ENGINE WILL BE REPLACED TO RETURN ACFT TO AIRWORTHY CONDITION.