What was found
CREW WHILE PERFORMING FIRST FLIGHT OF DAY CHECKS (ON GROUND, TTL PORTION OF CHK), NOTED A LOUD POP FROM LT ENGINE FOLLOWED BY SMOKE FROM ENG COWLS. STOP & FEATHER LEVER PULLED. CREW NOTED FLAMES EMANATING FROM ENG INLET PRIOR TO PROP ROTATION STOPPING. NR 1 FIRE BOTTLE DISCHARGED. CREW NOTED NO FLAME OR SMOKE AFTER ENG SHUT-DOWN. PAX EVACUATED WITHOUT INCIDENT. PRELIMINARY INSPECT OF ENG REVEALED NR 3 TURBINE WHEEL OUTER ONE-THIRD OF BLADES CHIPPED/MISSING DUE TO IMPACT/RUBBING DAMAGE. DEBRIS FLOW ABRADED THROUGH AFT TURB BEARING OIL LINE SHROUD AND OIL LINE CAUSING OIL LEAKAGE INTO EXH DUCT. AWAITING ENG TEAR-DOWN FINDINGS FOR CAUSE OF ENG FAILURE. ENG: TSN 8138.9, CSN 9910, TSO 2961.2, CSO 3581.