What was found
DURING CRUISE TO KJAC, AT FL270 NOTICED OIL LEAKING FROM THE FRONT OF THE LEFT ENGINE AND STREAKING ACROSS THE ENGINE COWL. LEFT ENGINE OIL PRESSURE WAS STARTING TO DROP BUT NEVER BELOW 60 PSI. AN EMERGENCY WAS DECLARED AND DIVERTED TO KPVU. LANDING WAS UNEVENTFUL. MAINTENANCE FOUND A LOOSE OIL LINE 'B' NUT ON THE TORQUER TRANSDUCER. SECURED SAME WITH NO FURTHER DEFECTS NOTED DURING OPERATIONAL CHECK. AIRCRAFT WAS RETURNED TO SERVICE.