19960117007759I

Narrative: oil was coming out of the rt turbocharger vent. Shut down engine. Starter adapter shaftgear found severed from contact with spring clutch. General text: 5 passengers aboard and one pilot, while abeam the island of niihau. At 2,500', oil was seen coming out of the rt turbocharger vent and trailing white smoke. All engine instruments were in the green. The pilot climbed to 4,500', and declared an emergency. The right engine was shut down when the oil pressure indicator reached the bottom of the green. Power was adjusted on the left engine and the aircraft was flown in this configuration back to lih with no other problems. The landing was okay, the aircraft was taxied to parking. No injuries were reported. The starter adapter spring clutch was found to have apparently failed and at least one piece of the spring came into continuous contact with the starter shaftgear assembly during continuous rotation causing the starter shaftgear to fail/sever. Mdr submitted against the start adapter. This aircraft has had one identical failure on the same engine, 01/07/96. Mdr submitted against the starter adapter. This aircraft has also had one similar failure on the left engine, 11/06/95. A broken scavenge pump drive gear was found that caused the back of scavenge pump body to crack. Mdr submitted against the starter adapter. Ptrs #WP139606117. Incident # IWP1396006. No pilot deviation. No NMAC. No eir. This incident is closed.