Casualties unknown

1991-04-19: Luscombe 8A (N45656) — Paul F. Clock — Clark Fork, ID

Clark Fork, ID, US

On April 19, 1991, a Luscombe 8A (registration N45656) operated by Paul F. Clock was involved in an aviation accident near Clark Fork, ID. Investigators recorded the probable cause as: The windshield blew out during cruise flight, causing directional instability that necessitated an emergency ditching in a river; a downed wire found at the site may have been involved. 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 1781061362Data APIEditorial standards

A pilot reported a sudden windshield blowout during cruise flight over a river, leading to directional instability and an emergency water landing near a downed power line.

What happened

During cruise flight over a river, the pilot experienced a sudden failure of the aircraft's windshield. The event occurred without prior warning, resulting in the immediate loss of the forward glazing. The pilot initially suspected that the failure was caused by a bird strike, though no avian impact was confirmed.

Following the structural breach, the airplane became directionally unstable. The aerodynamic forces acting on the airframe made controlled flight increasingly difficult. Recognizing the severity of the situation and the inability to maintain stable heading, the pilot decided to execute an emergency ditching in the river below.

The investigation

Post-accident examination of the site revealed significant environmental factors that may have contributed to the incident. Local sheriff's department personnel located a downed wire running across the river in the vicinity of the accident site.

The presence of this wire suggests it could have been involved in the windshield failure, either through direct impact or by creating an electrical discharge hazard. The investigation focused on determining whether the wire was struck by the aircraft or if the windshield failed independently.

Findings

The primary finding was the catastrophic loss of the windshield during flight. This led directly to directional instability, forcing the pilot to abandon the aircraft in a river environment. The discovery of the downed wire provides a critical clue regarding the cause of the initial failure.

Probable cause

The windshield blew out during cruise flight, causing directional instability that necessitated an emergency ditching in a river; a downed wire found at the site may have been involved.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X16889. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.