ASN Wikibase Occurrence # 247611
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| Date: | Sunday 7 February 2021 |
| Time: | 18:44 |
| Type: |  Lancair Evolution |
| Owner/operator: | GA Air LLC |
| Registration: | N7569A |
| MSN: | 067 |
| Year of manufacture: | 2016 |
| Total airframe hrs: | 387 hours |
| Engine model: | P&W Canada PT6A-42A |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Saratoga, WY -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Afton Municipal Airport, WY (AFO/KAFO) |
| Cheyenne Airport, WY (CYS/KCYS) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
On February 7, 2021, about 1844 mountain standard time, an experimental, amateur-built Lancair Evolution airplane, N7569A, was substantially damaged when it was involved in an accident near Saratoga, Wyoming. The pilot and the two passengers were not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight.
While in cruise flight at 27,000 ft mean sea level, the experimental, amateur-built airplane’s windshield shattered, followed immediately by a rapid decompression of the cabin. The pilot performed an emergency descent and landed uneventfully. The windshield was substantially damaged.
Examination revealed that the fracture originated from a small crack located at the exterior surface of the windshield within the bonded edge. The presence of parallel linear scratches near the fracture origin and on the windshield edge suggests that the bonded area was not sanded in accordance with the build instructions. The evidence also suggests that the inservice stresses in the as-manufactured windshield were high enough to cause fractures from scratches that deviated from the build instructions; therefore, it is likely that the windshield failure was the result of stress concentrations in the bond area due to scratches made with methods inconsistent with the build instructions.
Probable Cause: A windshield failure during cruise flight due to stress concentrations in the bond area as a result of improper assembly of the windshield.
Accident investigation:
 |
|
Sources:
NTSB
FAA
https://registry.faa.gov/aircraftinquiry/Search/NNumberResult
https://flightaware.com/live/flight/N7569A
https://www.jetphotos.com/photo/9507776
https://www.aopa.org/news-and-media/all-news/2017/october/19/evolution-aircraft-co-appears-to-have-shuttered
Location
Images:
Photo: NTSB
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 09-Feb-2021 01:35 | Geno | Added |
| 09-Feb-2021 12:35 | harro | Updated [Aircraft type] |
Corrections or additions? ... Edit this accident description
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