What was found
(CAN) AFTER LANDING OIL WAS OBSERVED LEAKING FROM #1 ENIGNE COWLING. THE OIL QUANTITY WAS TOPPED UP AND A GROUND RUN WAS CARRIED OUT. MAINTENANCE FOUND THE BOLTS WHICH RETAIN THE FORWARD BEARING HOUSING FOR THE COUPLING SHAFT (OUTPUT SHAFT) WERE LOOSE. THE BOLTS WERE RETORQUED AND THE HOUSING RESEALED. THE ENGINE WAS CHECKED FOR OIL LEAKS AND THE AIRCRAFT RETURNED TO SERVICE.