Casualties unknown

Microwave Tower Guy Wire Collision in IMC Results in Fatal Crash (N4579Z)

Pawnee, OK, US

On December 4, 1983, a Piper PA-22-108 (registration N4579Z) was involved in an aviation accident near Pawnee, OK. Investigators recorded the probable cause as: The pilot's failure to maintain visual reference and navigate safely in instrument meteorological conditions, compounded by the lack of a pre-flight weather briefing, which resulted in the aircraft colliding with a microwave tower guy wire. 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

A light aircraft collided with a microwave tower guy wire while flying at low altitude in instrument meteorological conditions, killing both occupants.

What happened

The aircraft was engaged in flight operations when it encountered instrument meteorological conditions (IMC). Prior to takeoff, the pilot had not received a weather briefing. Upon encountering low ceilings during the flight, the pilot attempted to navigate by flying along a highway at a low altitude.

While maintaining this low-level path, the right wing of the aircraft struck a guy wire attached to a microwave tower approximately 50 feet above ground level (AGL). The impact caused the aircraft to crash. Both occupants on board were fatally injured in the accident.

Findings

The investigation highlighted several critical factors contributing to the accident. The pilot's decision to continue flight into IMC without an adequate weather briefing played a significant role. Additionally, the attempt to fly at low altitude along a highway in poor visibility conditions led directly to the collision with the tower structure.

Probable cause

The pilot's failure to maintain visual reference and navigate safely in instrument meteorological conditions, compounded by the lack of a pre-flight weather briefing, which resulted in the aircraft colliding with a microwave tower guy wire.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001214X45287. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.