NTSB Identification: LAX89LA146.
The docket is stored on NTSB microfiche number 38838.
Accident occurred Tuesday, May 09, 1989 in SACRAMENTO, CA
Probable Cause Approval Date: 06/28/1991
Aircraft: BEECH A36, registration: N7238A
Injuries: 2 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.

DURING A CLIMB TO ALT, THE ENG SUDDENLY MADE A LOUD GRINDING SOUND & BEGAN TO VIBRATE. THE PLT MADE A FORCED LANDING IN A CULTIVATED FIELD. WHILE LANDING, THE ACFT ENCOUNTERED FURROWS IN THE TERRAIN & THE GEAR COLLAPSED. AN INSPN OF THE ENG REVEALED THE #4 PISTON HAD FAILED.

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

FAILURE OF THE NUMBER FOUR PISTON ASSEMBLY. A FACTOR RELATED TO THE ACCIDENT WAS: THE SOFT/UNEVEN TERRAIN IN THE EMERGENCY LANDING AREA.

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