American Champion 8KCAB N843AC

Summary

On 23 October 2021 at about 19:40 local time, a American Champion 8KCAB registered N843AC, operated by One Two Kilo Delta Corporation, was involved in an accident near Marengo, Wisconsin, United States. 2 people were on board and 2 died. The aircraft was destroyed. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

23 October 2021 at 19:40

Classification

Accident

Location

Marengo, Wisconsin, United States

Coordinates

46.4067, -90.8980

Aircraft

American Champion 8KCAB

Registration

N843AC

Category

Airplane

Year built

1999

Engines

1

Operator

One Two Kilo Delta Corporation

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Ashland → Eden Prairie

Aircraft damage

Destroyed

Weather

VMC

Light

Day

NTSB number

CEN22FA019

2 people died.

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.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

The pilot and passenger were conducting a personal flight. The pilot’s sister-in-law received a phone call from the pilot about 5 minutes before the accident, during which the pilot told her to wait outside because he intended to fly over her house. The airplane then overflew her position multiple times at a low altitude before she saw the airplane “doing a loop” shortly before it descended into terrain. Another witness saw the airplane flying “pretty low” about 200 - 400 ft above the ground. The witness stated that the airplane dove toward the ground while flying to the west before it “went back up going upside down” while flying to the south. The airplane then descended and crashed in a residential yard while flying north. Based on video footage, the pilot completed several low passes and steep turns while flying near his sister-in-law’s house; there was no video evidence that the pilot attempted an aerobatic loop maneuver. Further review of on-board video footage indicated the airplane’s bank angle exceeded 80° left-wing-down, and the stall warning horn was audible in the seconds before the accident. Another video, captured by the pilot’s sister-in-law on the ground, showed the airplane in a steep nose-down descent in the moments before the accident. Based on the available information, it is likely that the pilot did not maintain adequate airspeed during a steep turn, which resulted in the airplane exceeding its critical angle of attack and an inadvertent aerodynamic stall at a low altitude. The low altitude at which the aerodynamic stall occurred likely prevented a successful recovery. Postaccident examination of the airplane and engine revealed no evidence of a preexisting mechanical malfunction or failure that would have prevented normal operation of the airplane. Although the pilot’s autopsy revealed he had acute myocarditis, likely due to COVID-19, there was no evidence of impairment based on the on-board video footage. Additionally, toxicological testing did not reveal any impairing substances.

Quoted verbatim from the NTSB record.