What was found
(CAN) SHORTLY AFTER TAKEOFF, DURING INITIAL CLIMB, TOWER REPORTED SMOKE FROM RT ENGINE.PILOT IN COMMAND ACKNOWLEDGED SITUATION AND SHUT DOWN THE RT ENGINE AND RETURNED FOR LANDING.SIGNIFICANT OIL QUANTITY WAS LOST AS INDICATED ON OIL QUANTITY INDICATOR. APPROXIMATELY 7 GALS LOST.UPON INVESTIGATOIN, IT WAS FOUND EXHAUST PUSH ROD HOUSING OF CYLINDER NR 7 CRACKED. THEN, DURING THE REPLACEMENT, IT WAS FOUND THAT THE PUSH ROD ITSELF WAS SEPARATED AND CRACKED.PUSH ROD AND PUSH ROD HOUSING WERE REPLACED IAW PRATT & WHITNEY AND THE AIRCRAFT WAS RELEASED TO RETURN TO SERVICE.