NTSB Identification: ATL87DEI06.
The docket is stored on NTSB microfiche number 35337.
Accident occurred Wednesday, June 24, 1987 in WADSWORTH, OH
Probable Cause Approval Date: 12/27/1988
Aircraft: STEEN SKYBOLT, registration: N86173
Injuries: 2 Fatal.

THE ACCIDENT OCCURRED WHEN THE PILOT WAS PRACTICING AEROBATICS. THE INVESTIGATION DISCLOSED THAT LINKAGE CONTROL RODS BETWEEN THE PILOT'S STICK AND THE PITCH ELEVATOR WAS BROKEN. THE EVIDENCE INDICATED THAT THE FAILURE WAS CAUSED BY A COMBINATION OF INADEQUATELY SPECIFIED STRUCTURAL DESIGN AND IMPROPER FABRICATION. HIGH STRESS LEVELS RESULTED IN FATIGUE CRACKING OF THE REAR STICK CROSS HOLE.

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

FLT CONTROL SYST,ELEVATOR CONTROL..FAILURE,TOTAL

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

ACFT/EQUIP,INADEQUATE DESIGN..MANUFACTURER

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

MAINTENANCE,MODIFICATION..IMPROPER..PILOT IN COMMAND

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