NTSB Identification: LAX86LA347.
The docket is stored on NTSB microfiche number 31456.
Accident occurred Saturday, September 13, 1986 in RIO LINDA, CA
Aircraft: AERO COMMANDER 100, registration: N3879X
Injuries: 3 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.

AT THE END OF A LOCAL PLEASURE FLIGHT, THE PILOT NOTICED A LOSS OF OIL PRESSURE APPROXIMATELY 10 MILES NORTH OF RIO LINDA AIRPORT. THREE MINUTES LATER THE ENGINE BEGAN RUNNING ROUGH AND THE PILOT INITIATED AN EMERGENCY LANDING IN A RICE FIELD. UPON TOUCHDOWN, THE NOSE GEAR DUG INTO THE SOFT DIRT, BROKE OFF AND THE AIRCRAFT NOSED OVER. POST ACCIDENT INSPECTION REVEALED A 16TH INCH COPPER LINE BETWEEN THE OIL PRESSURE SWITCH AND THE OIL PRESSURE GAGE FAILED DUE TO FATIGUE.

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

LUBRICATING SYSTEM,OIL LINE..FATIGUE


Contributing Factors

LANDING GEAR,NOSE GEAR..SEPARATION


Contributing Factors

TERRAIN CONDITION..SOFT

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