FlightFinder
Check my flight
2 fatalities

2021 American Champion 8KCAB Accident Near Marengo, Wisconsin (N843AC)

Marengo, WI, United States

On October 23, 2021, an American Champion Aircraft 8KCAB (registration N843AC) operated by One Two Kilo Delta Corporation was involved in an aviation accident near Marengo, WI. 2 people were killed. Investigators recorded the probable cause as: The pilot’s failure to maintain adequate airspeed during the steep turn, which resulted in the airplane exceeding its critical angle of attack and an aerodynamic stall. This summary draws on records from NTSB; 12 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 2026-09-03Data APIEditorial standards

On October 23, 2021, an American Champion 8KCAB, N843AC, was destroyed in a fatal accident near Marengo, Wisconsin. The pilot and passenger died after the aircraft performed low-altitude maneuvers and crashed into a residential yard.

Accident Overview and Flight History On October 23, 2021, at approximately 1440 central daylight time, an American Champion Aircraft 8KCAB, registration N843AC, was destroyed in an accident near Marengo, Wisconsin. The aircraft was operating as a personal flight under Title 14 Code of Federal Regulations Part 91. Both the pilot and the passenger sustained fatal injuries. The pilot’s sister-in-law reported receiving a call from the pilot about five minutes before the crash, during which he mentioned he intended to fly over her house. The aircraft subsequently overflew her position at low altitude multiple times before performing a loop and crashing. Witness video captured the aircraft in a steep nose-down descent shortly before impact. Analysis of the audio from the video indicated a propeller blade passage frequency of about 80 Hz, corresponding to 2,400 rpm for the installed two-blade propeller. Another witness observed the aircraft flying 200 to 400 feet above the ground, diving toward the ground while heading west, then climbing upside down while heading south, before descending and crashing into a residential yard while heading north. A video recorded by the passenger in the rear seat showed the final maneuvers, including a negative-G maneuver, a rapid positive-G maneuver, and a steep left-wing-down bank of at least 80 degrees. The stall warning horn was audible during the final three seconds, and the video ended with the sound of impact. There was no video evidence of passenger interference with the flight controls.

Contributing factors

Airspeed — Not attained/maintainedAngle of attack — Not attained/maintainedPilot
Loss of control in flight

Related events

Same aircraft family

Frequently asked questions

What happened in the 23 Oct 2021 American Champion Aircraft 8KCAB accident near Marengo, WI?

On October 23, 2021, an American Champion 8KCAB, N843AC, was destroyed in a fatal accident near Marengo, Wisconsin. The pilot and passenger died after the aircraft performed low-altitude maneuvers and crashed into a residential yard.

Were there any fatalities in the 23 Oct 2021 American Champion Aircraft 8KCAB accident?

The accident was fatal, resulting in 2 fatalities.

What aircraft was involved and where did it happen?

The accident on 23 Oct 2021 involved an American Champion Aircraft 8KCAB, registration N843AC, operated by One Two Kilo Delta Corporation, at Marengo, WI.

What was the probable cause of the accident?

The pilot’s failure to maintain adequate airspeed during the steep turn, which resulted in the airplane exceeding its critical angle of attack and an aerodynamic stall. Also causal was the pilot’s decision to conduct steep turns without sufficient altitude to safely recover from an inadvertent aerodynamic stall.

More accident analyses