WPR12LA263

NTSB accident investigation · Cessna A185F · Winnett, MT · June 13, 2012

Accident · No injuriesLimited investigationFinal report
Date
June 12, 2012, 20:34 local (Jun 13, 2012, 02:34 UTC)
Place
Winnett, MT
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
CG-ZVFCessna A185F
Defining event
Landing: Loss of engine power (partial)
Weather
Visual (VMC) · Dusk
Status
Completed · report June 12, 2013
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
Case key
83969

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

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.

Findings · 3

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Mental/emotional statePersonnel issues › Psychological · PilotAll aircraft: 21 cases
Not determinedNot determined › Not determined · Unknown/Not determinedAll aircraft: 2,247 casesProbable cause
Object/animal/substance: wireEnvironmental issues › Physical environment · Not specifiedAll aircraft: 588 cases

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

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 narrative

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.

Aircraft

Registration
CG-ZVF
Reported as
Cessna A185F
Category
Airplane
Serial number
185-03202
Airframe hours
12,159
Engine
Continental IO-520-D, 300 hp, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Robin Johnson
Registered owner
Transwest Air Limited Partnership
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 7, 2012 · 6 hours before
Departed
CEN4 · High River
Destination
KBIL · Billings, MT

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
69
Injuries
None
Certificates
Private, Commercial
Airplane ratings
Single-engine land, Single-engine sea, Multi-engine land
Medical
Class 2, With waivers/limitations
Last flight review
January 1, 1990
Seat
Left
Flight hours
12,000 total · 7,000 in this make and model · 12,000 as pilot in command · 10 in the last 30 days

Weather

Conditions
Visual (VMC) · Dusk
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
10,000 ft broken
Temperature
64 °F, dew point 46 °F
Altimeter
29.90 inHg
Observed at
LWT, 140 nm away

Docket · 6

The files NTSB released with the investigation on April 17, 2013, on NTSB’s docket system: statements, records, photos and specialists’ reports. 15.7 MB in all.