Casualties unknown

Aircraft Collides with Power Lines and Crashes Inverted Near Open Field (N4379Z)

Sunnyside, WA, US

On April 7, 1985, a Piper PA-18-150 (registration N4379Z) was involved in an aviation accident near Sunnyside, WA. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-06-10Data APIEditorial standards

After striking electrical power lines, an aircraft crashed near an open field and came to rest inverted. Examination revealed extensive damage to the left wing and rear fuselage, no propeller rotation, carburetor heat on, corroded starter wires, and no preimpact failure.

Accident Overview

After striking electrical power lines, the aircraft crashed near an open field. The initial impact occurred where the wires crossed a draw between two ridges. Following the collision, the aircraft came to rest inverted in the area between the power lines and the open field.

Aircraft Condition

The aircraft was relatively intact but sustained extensive ground impact damage to the left wing. The rear fuselage exhibited compression and twisting. Heavy scrape marks were present on the left main landing gear. The propeller showed no evidence of rotational marks or damage.

Examination Findings

The left fuel cap was found off, with some fuel remaining in the rear corner of the tank; the right fuel cap was in place. The carburetor heat control was wedged in the on/hot position. The connecting wires to the starter switch were corroded at the attachment screws, partially separated, and the switch case was broken. No preimpact part failure or malfunction was verified.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001214X36314. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.