Casualties unknown

Loss of Engine Power in Snow Leads to Collision with Trees (N54791)

Steuben, WI, US

On December 12, 1995, a Piper PA-23-250 (registration N54791) operated by Robert G. Timm was involved in an aviation accident near Steuben, WI. Investigators recorded the probable cause as: failure of the pilot to select alternate air. Darkness and snowy weather conditions were related factors. 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 rear seat passenger reported both engines lost power while flying through heavy snow at night. The airplane descended and was destroyed after colliding with trees. Examination revealed ice in both engines' air induction systems.

Introduction

A recent aviation accident involved a twin-engine airplane that experienced a dual engine power loss while flying in heavy snow at night. The aircraft subsequently descended and was destroyed after impacting trees.

Accident Details

According to a rear seat passenger, the airplane was flying through heavy snow when both engines lost power. The loss of power occurred while the airplane was operating in instrument meteorological conditions at night. Following the power loss, the airplane descended and collided with trees, resulting in the destruction of the aircraft.

Examination Findings

An examination of the wreckage was conducted on December 13, 1995. During the inspection, ice was found in the air induction system of both engines. No other airplane or engine malfunctions were identified during the examination.

Handbook Guidance

The pilot's operating handbook for the airplane stated that alternate air should be placed in the full 'ON' position prior to entering known or expected icing conditions. This guidance is relevant to operations in icing environments.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001207X04966. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.