NTSB Identification: CHI90DEM07.
The docket is stored on NTSB microfiche number 45114.
Accident occurred Tuesday, July 31, 1990 in EAST JORDAN, MI
Probable Cause Approval Date: 12/30/1992
Aircraft: PITTS SA-1, registration: N15Z
Injuries: 1 Fatal.

THE PILOT OF A HOMEBUILT AEROBATIC BIPLANE WAS PERFORMING LOW ALTITUDE AEROBATICS FOR FRIENDS. THE AIRPLANE WAS FLYING INVERTED AT AN ESTIMATED ALTITUDE OF 300 FEET ABOVE THE GROUND WHEN IT DESCENDED AND COLLIDED WITH THE GROUND. WITNESSES ESTIMATED ITS ANGLE OF DESCENT AND SPEED TO BE 60 DEGREES AND 170 M.P.H., RESPECTIVELY.

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

THE PILOT-IN-COMMAND'S FAILURE TO MAINTAIN ALTITUDE DURING LOW ALTITUDE AEROBATICS.

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