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SEA90LA062

1990-04-05 · HILLSBORO, Oregon, United States · None · 1 aircraft · Status: Completed

Airport HIO

Current FAA registration · N9443K

Make / Model
UNIVERSAL STINSON 108-2
Year of manufacture
1947 · 43 years old at event
Engine
FRANKLIN 6A4165 SERIES (165 hp)
Seats / Engines
4 seats · 1 engine
ADS-B equipped
Yes — Mode-S AD1ECF

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

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.

Factual 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. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1990_SEA90LA062.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

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