Casualties unknown

Pilot Descends Below Minimum Descent Altitude and Collides with Terrain (N133BH)

Sault Ste Marie, MI, US

On August 14, 2006, a Piper PA-23-250 (registration N133BH) was involved in an aviation accident near Sault Ste Marie, MI. Investigators recorded the probable cause as: The pilot's failure to maintain aircraft control during the circling approach and his failure to perform a missed approach when the airplane was no longer in a position to land using normal flight maneuvers. 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

While on a VOR-A instrument approach, the pilot descended below the authorized minimum descent altitude, leveled off below it, made a steep left turn, and impacted terrain. No pre-impact mechanical malfunction was found.

Flight History

En route, approximately 23 minutes before the accident, the pilot reported having the current weather at the destination airport. The flight was cleared for the VOR-A instrument approach procedure with a circle-to-land maneuver for runway 27.

Weather and Approach

At the time of the pilot's report, the reported weather at the destination airport was scattered clouds at 900 feet above ground level (agl), an overcast ceiling at 3,500 feet agl, and visibility of 3 miles. At the time of the accident, the airport's reported weather was an overcast ceiling at 300 feet agl and visibility of 1-1/4 miles.

Accident Sequence

According to aircraft radar track data, the airplane descended below the approach's authorized minimum descent altitude (MDA) approximately 2.6 miles northeast of the airport. The airplane then leveled off about 175 feet below the MDA and maintained that altitude until crossing over the intersection of the airport's two runways. Subsequently, the airplane made a left turn to the east and paralleled runway 27 about 600 feet south of the runway. The airplane's last radar return was recorded at 185 feet agl and about 0.5 miles east of the runway threshold. The point of impact was approximately 725 feet north of the final radar return.

Numerous witnesses reported seeing the airplane traveling eastbound at an estimated altitude between 150 and 200 feet agl. The airplane then performed a left turn back towards the airport before impacting nose-first into the terrain. Several witnesses reported that the airplane reached a bank angle of approximately 90 degrees during the turn. The airplane's altitude and proximity to the runway prevented an approach to landing using normal flight maneuvers.

Wreckage and Examination

A majority of the airframe was destroyed during a post-impact ground fire. Examination of the recovered wreckage revealed no evidence of a pre-impact mechanical malfunction.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20060822X01224. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.