Sunday, March 07, 2021

Aviat A-1B Husky, N166WW: Fatal accident occurred March 06, 2021 in Berwyn, Nebraska

This is preliminary information, subject to change, and may contain errors. Any errors in this report will be corrected when the final report has been completed.

The National Transportation Safety Board did not travel to the scene of this accident.

Additional Participating Entities:
Federal Aviation Administration / Flight Standards District Office; Lincoln, Nebraska
Lycoming; Williamsport, Pennsylvania 

Location: Berwyn, NE 
Accident Number: CEN21FA150
Date & Time: March 6, 2021, 06:10 Local
Registration: N166WW
Aircraft: Aviat A-1B
Injuries: 1 Fatal
Flight Conducted Under: Part 91: General aviation - Personal

On March 6, 2021, about 0610 central standard time, an Aviat A-1B airplane, was destroyed when it was involved in an accident near Berwyn, Nebraska. The pilot was fatally injured. The airplane was operated as a Title 14 Code of Federal Regulations (CFR) Part 91 personal flight. 

The purpose of the flight was to fly from the pilot’s private runway to Holyoke, Colorado, for an annual inspection. About 0555, the airplane was first observed on primary radar about 1/2 mile south of the private runway. The airplane track proceeded generally west-southwest about 87 knots. About 11 miles from the runway, it made a left turn toward the south. The track then made right 360-degree turn and the speed of the airplane increased to about 114 knots. The track then made a second, tighter, 360-degree turn at 49 knots and decreasing. The track then zig zagged generally eastbound between 20-30 knots until the track terminated at 0609.

When the airplane did not arrive at its destination, an ALNOT was issued; shortly thereafter, it was located about 1,000 ft from the last radar point. The airplane impacted a field perpendicular to a gully in a very rural area; the debris field was about 300 ft long. The first identified point of impact was a long narrow area of disturbed dirt with the right wingtip nearby. Followed by two slash marks consistent with propeller blade slices, then a large area of disturbed dirt with propeller blade fragments. The main wreckage came to rest at the bottom of a gully, and the last piece of debris was the engine. There were no witnesses to the accident.

At the time of the accident the moon was 22.97 degrees above the horizon, and at third quarter phase. Its illumination was 45.1% of the moon’s full potential. There were no high-altitude cloud layers. Dawn started at 0636 and sunrise was at 0704.

Aircraft and Owner/Operator Information

Aircraft Make: Aviat 
Registration: N166WW
Model/Series: A-1B 
Aircraft Category: Airplane
Amateur Built: No
Operator: On file 
Operating Certificate(s) Held: None
Operator Designator Code:

Meteorological Information and Flight Plan

Conditions at Accident Site: VMC
Condition of Light: Night
Observation Facility, Elevation: BBW,2546 ft msl
Observation Time: 05:53 Local
Distance from Accident Site: 13 Nautical Miles
Temperature/Dew Point: -1°C /-2°C
Lowest Cloud Condition: Clear
Wind Speed/Gusts, Direction: / ,
Lowest Ceiling: None 
Visibility: 10 miles
Altimeter Setting: 30.15 inches Hg
Type of Flight Plan Filed: None
Departure Point: Mason City, NE (PVT)
Destination: Holyoke, CO (HEQ)

Wreckage and Impact Information

Crew Injuries: 1 Fatal
Aircraft Damage: Destroyed
Passenger Injuries: 
Aircraft Fire: On-ground
Ground Injuries: 
Aircraft Explosion: None
Total Injuries: 1 Fatal 
Latitude, Longitude: 41.1965,-99.4836 
Those who may have information that might be relevant to the National Transportation Safety Board investigation may contact them by email, and any friends and family who want to contact investigators about the accident should email

Keith Walker
July 02, 1946 - March 06, 2021

Keith Walker age 74 of Mason City, NE passed away March 6, 2021 in rural Custer County.

Funeral services will be Monday, March 15, 2021 at 1:00 pm at Govier Brothers Chapel in Broken Bow, NE with Cole Leach officiating. Burial will be in the Mason City Cemetery with Military Honors in Mason City, NE. Memorials are suggested to Ansley Fire & Rescue or Homeward Trail Bible Camp. Govier Brothers Mortuary are in charge of arrangements. An online guest book may be signed for words of encouragement or remembrance at

Keith Allan Walker was born July 2, 1946 to Gordon and Gertrude (Eastman) Walker in Ansley, Nebraska. Keith passed away on March 6, 2021. Keith married Sara Anthony on November 25, 1977 at Custer County Courthouse in Broken Bow Nebraska. Keith and Sara have one son, Chris Walker. Keith was especially fond of his son and grandchildren, Kylee, Kolten, Kenneth, and their mother, Kursten.

Keith lived on the Walker family ranch all his life. He graduated from Mason City High School in 1964.  Keith went to Kearney State College graduating in 1969 and then was drafted into the Army shortly thereafter. Keith’s military service was deployment to Vietnam during the Vietnam War. Keith was a long-time member of American Legion in Mason City, Nebraska.

Upon return from the military, Keith stayed to help his dad on the family ranch and bought a few cattle. Gradually, his involvement increased, and he devoted his life to the Walker Cattle Company. He spent most of his days creating a successful ranch while remaining a conscientious steward of the land. He truly enjoyed his time in his plane, in his pastures, and with his grandchildren. There was not a day that Keith wouldn’t work.

Keith had an adventurous nature and loved to go water and snow skiing, fishing, on hiking and camping trips in the mountains with his friends. And, he always had stories to tell about it when he got back. He liked fishing near Pierre, South Dakota and planned to spend more time there.

Keith is survived by his wife of 44 years, Sara, son Chris and his family, nephews Scot, Jon, and Kevin and niece, Patricia, all living in Colorado. He leaves behind numerous friends and business associates.

Keith is preceded in death by his parents Gordon and Gertrude (Eastman) Walker, and a brother.

NORTH PLATTE, Nebraska (KNOP) - The pilot of a small single-engine plane was expected in Mason City Saturday morning but was found dead among the wreckage of his plane by local responders Saturday afternoon.

74-year old Keith A. Walker of rural Mason City was the pilot and the only occupant of the small single-engine plane discovered approximately seven miles southwest of Ansley.

A press release from the Custer County Sheriff’s Office reveals the office received a report at 1:09 p.m. of an overdue plane that left the Mason City area at approximately 6:30 a.m. en route to Holyoke, Colorado.

At 4:37 p.m. a report from the Civil Air Patrol advised the Custer County Sheriff’s Office that a small single-engine plane crash was located in a pasture approximately seven miles southwest of Ansley.

The Custer County Sheriff’s Office, Nebraska State Patrol, Ansley Fire and Rescue, Mason City Fire and Rescue, and Broken Bow Fire and Rescue were dispatched to the location. Upon arrival, the plane was discovered destroyed by the crash.

At this time, the plane crash investigation has been turned over to the Federal Aviation Administration and the National Transportation Safety Board.

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