Casualties unknown

Twin-Engine Aircraft Accident with Loss of Power and Intentional Engine Shutdown (N1237P)

Maricopa, AZ, US

On June 1, 1991, a Piper PA-23 (registration N1237P) operated by Robert Tichy was involved in an aviation accident near Maricopa, AZ. Investigators recorded the probable cause as: THE PILOT'S POOR JUDGEMENT IN THE OPERATION OF THE AIRPLANE WITH KNOWN DEFICIENCIES AND THE INADVERTENT STALL DURING A FORCED LANDING. THE PILOT/OWNERS LACK OF MAINTENANCE ON THE AIRPLANE AND THE PILOT'S IMPAIRMENT BY ALCOHOL WERE FACTORS IN THE ACCIDENT. 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 private pilot and passenger were fatally injured when a twin-engine airplane crashed after witnesses reported left engine power loss. Investigation found unairworthy condition, automotive gasoline, and pilot lacking medical certificate and multiengine rating.

Accident Overview

A certificated private pilot and a passenger departed in a twin-engine airplane for a local flight. The aircraft was reported overdue, and witnesses observed that the left engine was not producing full power. The airplane was located the following day approximately 22 miles from the departure airport. Both occupants sustained fatal injuries.

Investigation Findings

The investigation determined that the airplane was unairworthy. The left engine primer was not locked, and automotive gasoline had been used in the aircraft. The pilot intentionally secured the engines and feathered the propellers. The airplane struck the ground with little forward speed, at a high vertical descent rate, in a nose-down and near wings-level attitude.

The pilot did not possess a current medical certificate or a multiengine rating. The pilot's recency of experience could not be determined. Toxicological testing revealed that alcohol was present in the blood of both the pilot and passenger.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X17024. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.