What was found
IFSD (SINGLE ENGINE) DURING CRUISE AT FL80, THE PILOT RECEIVED A CHIP DETECTOR WARNING FOLLOWED BY A DROP OF OIL PRESSURE TO ZERO. SMOKE WAS SEEN COMING OUT OF THE ENGINE COWLING. THE ENGINE WAS SHUT DOWN AND A FORCED LANDING WAS MADE ON AN UNAPPROVED RUNWAY. THERE WERE NO INJURIES AND NO DAMAGE TO THE AIRCRAFT. THE AUTHORITIES HAVE REQUESTED MANUFACTURER`S ASSISTANCE FOR A PRELIM ENGINE EXAM.