What was found
(CAN) NEW PRODUCTION ACFT RETURNING FROM PAINTING, DURING FLIGHT, THE PILOT HEARD A HIGH PITCH NOISE FOLLOWED BY A DROP IN OIL PRESSURE AND SMOKE OUT OF THE EXHAUST. THE ENGINE WAS SECURED AND A SAFE DEAD STICK LANDING FOLLOWED. POST FLIGHT INSPECTION FOUND OIL IN THE EXHAUST AND A RIP IN THE "SKI JUMP" OF THE EXHAUST CASE.