NTSB Identification: LAX88LA025.
The docket is stored on NTSB microfiche number 36239.
Nonscheduled 14 CFR
Accident occurred Monday, October 26, 1987 in BORREGO SPRINGS, CA
Probable Cause Approval Date: 06/16/1989
Aircraft: MCDONNELL DOUGLAS 369D, registration: N47861
Injuries: 4 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE PILOT AND THREE PASSENGERS WERE FLYING AT LOW ALTITUDE OVER MOUNTAINOUS TERRAIN LOOKING FOR BIG HORN SHEEP. THIRTY MINUTES INTO THE FLIGHT THE PILOT HEARD A LOUD NOISE AND THE TAIL YAWED LEFT. THE PILOT TURNED AWAY FROM THE MOUNTAIN TO LOOK FOR A PLACE TO LAND. THE ENGINE LOST ALL POWER. BECAUSE IT WAS NECESSARY TO STRETCH THE GLIDE TO REACH THE ONLY AVAILABLE LANDING SPACE, THERE WAS INSUFFICIENT ROTOR SPEED REMAINING TO CUSHION THE LANDING. THE AIRCRAFT LANDED HARD, BREAKING THE RIGHT LANDING SKID AND ROLLING OVER ONTO ITS SIDE. EXAM OF THE ENG REVEALED THAT THE NO. 6 & 7 BEARINGS WERE FOUND TO HAVE FAILED DUE TO OIL STARVATION. THE REASON FOR THE OIL STARVATION COULD NOT BE DETERMINED.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

LUBRICATING SYSTEM..STARVATION

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

TURBINE ASSEMBLY,SHAFT BEARING..FAILURE,TOTAL


Contributing Factors

TERRAIN CONDITION..ROUGH/UNEVEN


Contributing Factors

LANDING GEAR..OVERLOAD


Contributing Factors

LANDING GEAR..COLLAPSED

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