Casualties unknown

2015-02-11: PIPER AIRCRAFT CORPORATION PA-18-180M (HB-PHX) — Croix-de-Coeur, VS, CH

Croix-de-Coeur, VS, CH

On February 11, 2015, a PIPER AIRCRAFT CORPORATION PA-18-180M (registration HB-PHX) was involved in an aviation accident near Croix-de-Coeur, VS, CH. Investigators recorded the probable cause as: The primary cause of the incident was the **failure of the pilot to maintain directional control** due to the tailwheel ski remaining turned to the left, which led to a collision with ground markers. This summary draws on records from the Swiss Transportation Safety Investigation Board (STSB / SUST).

Sourcesthe Swiss Transportation Safety Investigation Board (STSB / SUST)Primary reportUpdated 1785639345Data APIEditorial standards

A private flight operation in Nendaz resulted in a ground collision after the pilot lost directional control while attempting to reposition an aircraft.

What happened

On February 11, 2015, a PA-18-180M operated by Groupe de vol montagne et glacier was involved in a ground incident near the Croix de Coeur in the municipality of Nendaz. Following a landing and a full stop adjacent to the maneuvering area, the pilot attempted to reposition the aircraft toward the start of a snow-covered takeoff surface.

During the turn, the pilot encountered an obstacle in the form of a parked aircraft. To avoid this, the pilot paused the maneuver and instructed the passenger to exit the cabin to assist with the turn manually. After the passenger re-entered the cockpit, the pilot applied power to realign the aircraft. Despite repeated attempts to use the right rudder pedal, the pilot was unable to correct the direction of the tailwheel ski, which remained turned to the left.

As a result, the aircraft drifted into two wooden marker poles. The collision caused damage to the propeller and the right leading edge of the wing. The engine stopped following the impact, and the aircraft slid approximately 50 meters before coming to a final rest. The passenger was uninjured, while the pilot sustained minor injuries.

The investigation

The investigation focused on the sequence of events during the taxi maneuver and the mechanical or operational factors that prevented effective directional control. Investigators examined the aircraft's configuration, specifically the position of the tailwheel ski, and the pilot's inputs via the rudder pedals during the attempt to realign for takeoff.

Probable cause

The primary cause of the incident was the **failure of the pilot to maintain directional control** due to the tailwheel ski remaining turned to the left, which led to a collision with ground markers.

Investigation report by the Swiss Transportation Safety Investigation Board (STSB / SUST). Original record: https://www.sust.admin.ch/inhalte/AV-berichte/HB-PHX.pdf. This page is a structured re-presentation; facts and quotes are in the Swiss Transportation Safety Investigation Board (STSB), Switzerland.