Casualties unknown

Airplane Performs Uncontrolled Descent During Instructional Flight (N4439P)

Ontario, OR, US

On July 15, 2004, a Piper PA-23-160 (registration N4439P) was involved in an aviation accident near Ontario, OR. Investigators recorded the probable cause as: The pilot's failure to maintain airspeed resulting in an aerodynamic stall while maneuvering for an approach to land. 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

During a multi-engine instructional flight, the airplane was observed entering a left-wing-low spin and impacting terrain two miles from the destination airport. Post-crash examination found the emergency hydraulic pump handle extended.

Accident Overview

During a FAR Part 91 instructional flight, the second pilot, who had recently purchased the airplane to pursue a multi-engine rating, was on his third flight in two days in the multi-engine airplane. Witnesses observed the airplane approaching the airport from the southeast in level flight attitude. One witness reported that the airplane was traveling slowly, as if on a landing procedure, and then appeared to "auger" toward the ground in a left wing low attitude, making approximately three revolutions before impacting the terrain in a nose low attitude.

Post-Crash Findings

The accident site was located approximately two miles from the destination airport. Examination of the airframe and both engines revealed no evidence of a pre-crash failure or anomaly. However, during the post-crash examination, the emergency hydraulic pump handle was observed in the full aft (extended) position.

Investigation Status

No probable cause has been determined based solely on the available information. The investigation is ongoing.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20040722X01035. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.