Aviation Accident Summaries

Aviation Accident Summary WPR12LA263

Winnett, MT, USA

Aircraft #1

CG-ZVF

CESSNA A185F

Analysis

The pilot reported that he recently purchased the accident airplane, which had previously been in storage. Before he departed, the airplane’s fuel tanks were filled and a preflight check revealed no contaminants. During the night flight, the pilot switched fuel tanks, and the engine sputtered and lost power. He attempted to restart the engine while descending toward a highway for a forced landing. After the pilot switched the fuel selector back to the original fuel tank, the engine restarted; however, moments later the airplane struck a transmission wire, which the pilot did not see until the last minute because of the dark lighting conditions. The pilot made a forced landing in a field. The pilot attributed the engine sputtering to undetected water in the fuel system; however, a postaccident examination of the fuel system revealed no contaminants, and operation of the engine showed no mechanical malfunctions or failures that would have precluded normal operation. The pilot added that he had “recently lost his wife and had not been thinking correctly.” The pilot did not have a current flight review or medical certificate.

Factual Information

On June 12, 2012, at 2034 mountain daylight time, a Cessna A185F, CG-ZVF, registered to Transwest Air Limited Partnership and operated by the pilot, sustained substantial damage during a landing after a loss of engine power near Winnett, Montana. The commercial pilot, the sole occupant, was not injured. The pilot was operating the airplane under the provisions of 14 Code of Federal Regulations Part 91. The flight departed from High River Regional Airport, High River, Alberta, Canada, and was destined for Billings Logan International Airport, Billings, Montana. Night visual meteorological conditions prevailed and no flight plan was filed. The pilot was interviewed following the accident. He reported that he had recently lost his wife and had not been thinking correctly. He indicated that he likely would not have made the flight under normal circumstances. The pilot did not hold a current medical or flight review. He purchased the stored airplane in Canada and did not file a required flight plan upon his departure. Before takeoff, the fuel tanks were filled to capacity and the pilot drained fuel samples from all of the fuel tanks. He did not identify water or other contaminants. While in cruise flight over a highway, the pilot switched fuel tanks and the engine sputtered and then lost power. As the airplane descended, the pilot tried to restart the engine. The airplane continued to descend and the pilot did not see a transmission line until the last minute due to the dark lighting conditions. He switched back to the original tank, attempted to restart the engine again, and it restarted. After the airplane impacted the transmission line, the pilot was able to maneuver the airplane and then landed it on a highway. The pilot attributed the engine sputtering to undetected water in the fuel system. Later operation of the engine and fuel system showed no mechanical anomalies. According to the Federal Aviation Administration (FAA) accident coordinator, the right wing impacted a transmission line during the landing, resulting in substantial damage. Post accident fuel sampling identified no fuel contaminants. A flight plan or flight itinerary is required in Canada when pilots are more than 25 nautical miles from the departure airport or when operating between Canada and a foreign country.

Probable Cause and Findings

A momentary loss of engine power, which led to an emergency descent at night during which the airplane collided with a wire. The reason for the loss of engine power could not be determined because postaccident examination and operation did not reveal any anomalies that would have precluded normal operation.

 

Source: NTSB Aviation Accident Database

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