1990-04-05: Stinson 108-2 — Hillsboro, OR

Casualties unknown • Hillsboro, OR, US

Probable cause

PILOT DISPLAYED POOR STARTING PROCEDURES BY PROCEEDING WITH KNOWN DEFICIENCIES WITH THE PARKING BRAKE AND THE INADEQUACIES OF THE TIE DOWN. THE PILOT DID NOT ATTAIN ASSISTANCE FOR THIS PROCEDURE WHICH RESULTED IN THE AIRPLANE GETTING AWAY AND COLLIDING WITH TWO PARKED AIRPLANES.

— NTSB Determination

Accident narrative

THE PILOT REPORTED THAT HE HAD SECURED THE TAIL OF THE AIRPLANE WITH A TIE DOWN CHAIN, SET THE PARKING BRAKE AND ADJUSTED THE THROTTLE TO 550 RPM'S. THE PILOT THEN PROCEEDED TO HAND PROP THE ENGINE. THE ENGINE STARTED AND THE PILOT BEGAN TO WALK AROUND THE AIRPLANE WHEN HE NOTED THAT THE AIRPLANE STARTED FORWARD MOVEMENT. THE AIRPLANE OVERRODE THE PARKING BRAKE AND BROKE THE TIE DOWN CHAIN. THE PILOT SLIPPED AND WAS UNABLE TO GET INSIDE THE COCKPIT. THE AIRPLANE PROCEEDED FORWARD AND COLLIDED WITH TWO PARKED AIRPLANES.

Frequently asked questions

What happened in the 1990-04-05 Stinson 108-2 accident near Hillsboro, OR?

What aircraft was involved and where did it happen?

The accident on 1990-04-05 involved a Stinson 108-2, registration N9443K, at Hillsboro, OR.

What was the probable cause of the accident?

PILOT DISPLAYED POOR STARTING PROCEDURES BY PROCEEDING WITH KNOWN DEFICIENCIES WITH THE PARKING BRAKE AND THE INADEQUACIES OF THE TIE DOWN. THE PILOT DID NOT ATTAIN ASSISTANCE FOR THIS PROCEDURE WHICH RESULTED IN THE AIRPLANE GETTING AWAY AND COLLIDING WITH TWO PARKED AIRPLANES.

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