Loss of control on ground: Beechcraft A36 Bonanza, N9379Q, fatal accident occurred on September 29, 2023, at Broken Bow Municipal Airport (90F), Broken Bow, Oklahoma

• Location: Broken Bow, Oklahoma 
• Accident Number: CEN23LA423 
• Date & Time: September 29, 2023, 14:15 Local 
• Registration: N9379Q 
• Aircraft: Beech A36 
• Aircraft Damage: Substantial 
• Defining Event: Loss of control on ground 
• Injuries: 1 Fatal, 1 None 
• Flight Conducted Under: Part 91: General aviation - Personal

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On September 29, 2023, about 1425 central daylight time, a Beech A36 airplane, N9379Q, was involved in an accident while landing at Broken Bow Airport (90F), near Broken Bow, Oklahoma. The pilot was not injured. An airport grounds worker was fatally injured. The airplane received substantial damage. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight.

While on approach to land, the pilot watched for tractors that were bailing hay. During the landing flare, the pilot saw an airport grounds worker mowing the grass next to the right side of the runway. He attempted to avoid the worker by pulling back on the control yoke. The airplane drifted to the right, touched down, and the right wing struck the worker, who was fatally injured. The airplane sustained substantial damage to the right wing.

The worker was mowing along the edge of runway, which was 50 ft. wide. The wingspan of the airplane was 33 ft 6 inches; therefore, the centerline of the airplane would have to have been at least 8 ft 3 inches to the right of the runway centerline to place the right wingtip directly over the runway edge.

The pilot did not adequately compensate for the crosswind during landing, and the airplane was not aligned with the runway centerline during landing and landing roll, which resulted in the airplane striking the grounds worker.

According to the airport manager, the worker was not scheduled to be mowing at the airport on the day of the accident, and he was unaware that she elected to begin mowing at the airport. He was also unaware that Notices to Airmen (NOTAM) should be issued, and no NOTAM had been issued for the mowing or hay bailing operations being conducted at the airport.

- Probable Cause: The pilot's failure to maintain the runway centerline during landing and subsequent failure to maintain clearance from the airport grounds worker during the landing roll. Contributing to the accident was the absence of a NOTAM for mowing operations at the time of the accident.