No fatalities

Engine Failure Exercise Leads to Runway Excursion During Training Flight (HB-LFR)

Geneva-Cointrin, SwitzerlandLanding (descent or approach)

On September 16, 1971, a Piper PA-31-310 Navajo (registration HB-LFR) operated by ALG Aeroleasing was involved in an aviation accident near Geneva-Cointrin, Switzerland during landing or approach. No fatalities were reported. Investigators recorded the probable cause as: The crew voluntarily shut down an engine during final approach as part of an engine failure exercise. The cause of the loss of control after touchdown could not be determined. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 1 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary report: the Swiss Transportation Safety Investigation Board (STSB / SUST)Updated 2026-07-04Data APIEditorial standards

During a local training flight, a twin-engine aircraft veered off runway 05 after touchdown at Geneva-Cointrin Airport, crossing a taxiway and apron before stopping in a work zone. Both pilots were injured.

Incident Overview

A training flight at Geneva-Cointrin Airport resulted in a runway excursion when the aircraft lost directional control after landing. The crew, engaged in a local training mission, had shut down one engine during the final approach as part of an engine failure exercise. After touchdown on runway 05, the twin-engine aircraft veered off the runway to the right, crossed a taxiway and the apron, and eventually came to rest in a work zone.

Injuries and Damage

Both pilots sustained injuries. The aircraft was damaged beyond repair.

Probable Cause

According to official findings, the crew voluntarily shut down an engine during final approach as part of an engine failure exercise. However, the specific cause of the loss of control after touchdown could not be determined. Following this accident, the Federal Office for Civil Aviation (FOCA) prohibited any engine shutdown in flight, even during training missions.

Frequently asked questions

What happened in the 16 Sept 1971 Piper PA-31-310 Navajo accident near Geneva-Cointrin, Switzerland?

During a local training flight, a twin-engine aircraft veered off runway 05 after touchdown at Geneva-Cointrin Airport, crossing a taxiway and apron before stopping in a work zone. Both pilots were injured.

Were there any fatalities in the 16 Sept 1971 Piper PA-31-310 Navajo accident?

No fatalities were recorded in this accident.

What aircraft was involved and where did it happen?

The accident on 16 Sept 1971 involved a Piper PA-31-310 Navajo, registration HB-LFR, operated by ALG Aeroleasing, at Geneva-Cointrin, Switzerland.

What was the probable cause of the accident?

The crew voluntarily shut down an engine during final approach as part of an engine failure exercise. The cause of the loss of control after touchdown could not be determined.