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| Title: | Midair collision, North Central Airlines, Inc., Allison Convair 340/440, (CV-580) N90858, And Air Wisconsin Incorporated, DHC-6, N4043B, near Appleton, Wisconsin, June 29, 1972 |
| Micro summary: | A Convair 340/440 and DHC-6 collided in midair, destroying both airplanes and killing all occupants. |
| Event Time: | 1972-06-29 at 1037 CDT |
| File Name: | 1972-06-29-US.pdf |
| Publishing Agency: | National Transportation Safety Board (NTSB) |
| Publishing Country: | USA |
| Report number: | NTSB-AAR-1973-09 |
| Pages: | 40 |
| Site of event: | Approach to Oshkosh RWY 27, Lake Winnebago near Appleton, WI |
| Latitude/Longitude: | N44°11', W088°24' |
| First Airplane | Second Airplane | ||
| Departure: | Austin Straubel International Airport (Green Bay), Ashwaubern Wisconsin, USA | Unknown | |
| Destination: | Wittman Regional Airport, Oshkosh, Wisconsin, USA | Outagamie County Regional Airport, Appleton, Wisconsin, USA | |
| Airplane Type(s): | Allison Convair 340/440 (CV-580) | DHC-6 | |
| Flight Phase: | Approach | Approach | |
| Registration(s): | N90858 | N4043B | |
| Operator(s): | North Central Airlines | Air Wisconsin | |
| Type of flight: | Revenue | Revenue | |
| Occupants: | 5 | 8 | |
| Fatalities: | 5 | 8 | |
| Serious Injuries: | 0 | 0 | |
| Minor/Non-Injured: | 0 | 0 | |
| Other Injuries: | 0 | 0 |
| Executive Summary: | A North Central Airlines Allison Convair 3401440 (CV-580) and an Air Wisconsin Incorporated DHC-6 collided over Lake Winnebago near Appleton, Wisconsin, at approximately 1037 central daylight time, June 29, 1972. The two passengers and three crewmembers aboard the CV-580 and the six passengers and two crewmembers aboard the DHC-6 were fatally injured. Both aircraft were destroyed as a result of the in-flight collision and the subsequent water impact. Both flights were operating in accordance with visual flight rules and were within minutes of landing at their respective destinations. Visual meteorological conditions existed in the accident area. The National Transportation Safety Board determines that the probable cause of this accident was the failure of both flightcrews to detect visually the other aircraft in sufficient time t o initiate evasive action. The Board is unable to determine why each crew failed to see and avoid the other aircraft; however, the Board believes that the ability of both crews to detect the other aircraft in time to avoid a collision was reduced because of atmospheric conditions and human visual limitations. |
| Learning Keywords: | Operations - Airspace - Air Traffic Control |
| Operations - Airspace - Mid-Air Collision | |
| Operations - Airspace - See & avoid | |
| Consequence - Hull Loss |
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