ASN Wikibase Occurrence # 80423
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| Date: | Monday 1 November 2010 |
| Time: | 14:15 |
| Type: |  Quad City Challenger II |
| Owner/operator: | Private |
| Registration: | N448WM |
| MSN: | CH2-1002-2263 |
| Engine model: | Bombardier Rotax |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Sauk County, 3 miles north of Sauk Prairie Airport, Prarie du Sac, WI -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Prairie Du Sac, WI (91C) |
| Merrill, WI (RRL) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The airplane impacted the ground following an in-flight separation of the left wing during cruise flight. The pilot, who was the sole occupant, was fatally injured. Witnesses reported seeing the airplane traveling north, about 300-500 feet above ground level, when one wing suddenly separated from the airplane. One of the witnesses stated that the other wing separated shortly after the first one. Postaccident examination confirmed that both wings were completely separated from the airplane with the exception of the right wing aft spar and aileron. Examination of the fractures in the wing attachment fittings revealed signatures consistent with overload failure with the exception of one fitting that had no perceptible damage due to deformation or fracture. The attachment bolt for the fitting that showed no perceptible overload damage was not recovered during the investigation; however, the relative lack of damage to the strut fitting indicates that the attachment bolt either failed, or its corresponding nut had loosened and separated during the flight. A portion of wing fabric retained for testing showed that the fabric met the minimum performance requirements as set forth in regulations. No preaccident defects were found with regard to the components examined.
Probable Cause: The separation of the fuselage-mounted wing strut attachment fitting for an undetermined reason, which resulted in the separation of the left wing of the airplane.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: http://www.wiscnews.com/news/article_73e0f122-e62f-11df-8b49-001cc4c03286.html
http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N448WM
http://www.airnav.com/airport/91C
Location
Media:
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Nov-2010 08:52 | gerard57 | Added |
| 02-Nov-2010 15:21 | Anon. | Updated [Aircraft type, Registration, Cn, Operator, Other fatalities, Location, Departure airport, Destination airport, Source] |
| 03-Nov-2010 14:22 | harro | Updated [Embed code] |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 26-Nov-2017 18:37 | ASN Update Bot | Updated [Cn, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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