ASN Wikibase Occurrence # 236603
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| Date: | Sunday 31 May 2020 |
| Time: | 15:46 |
| Type: |  Piper PA-28-235 Cherokee |
| Owner/operator: | Cleared for Takeoff LLC |
| Registration: | N8991W |
| MSN: | 28-10571 |
| Year of manufacture: | 1964 |
| Total airframe hrs: | 2235 hours |
| Engine model: | Lycoming O-540-B4B5 |
| Fatalities: | Fatalities: 4 / Occupants: 4 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Macoupin County south of Carlinville, IL -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Creve Coeur Airport, MO (1H0) |
| Creve Coeur Airport, MO (1H0) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Position data depicted the airplane in cruise flight on a northeast course toward the destination airport at 5,500 ft mean sea level (msl). Shortly before the accident, the airplane entered a left turn with a gradually steepening bank angle. After completing a 360º turn and returning to a northeast course, the airplane immediately transitioned into a right turn that continued until the airplane again returned to a northeast course. Airplane bank angles reached 50° and 60° in the left and right turns, respectively. As the right turn continued, the airplane entered a descent and the airspeed increased. The bank angle ultimately reached about 110° (right wing down), the pitch attitude reached 63° nose down, and the airspeed increased to over 200 kts during the descent. The maximum computed load factor based on the available data was 4.72 G. The position data ended when the airplane was between 2,000 ft and 2,500 ft msl (1,400 ft and 1,900 ft above ground level). At the end of the data, the airplane was in a steep, spiral dive and about 35 kts above the never-exceed airspeed (VNE). The airplane was established on a southwesterly course away from the accident site at that time.
The wreckage debris path was oriented on a northeasterly course and was about 400 ft long. The wreckage distribution was consistent with a low-altitude inflight break up. In addition, the presence of all airframe structural components and flight control surfaces within the debris path was consistent with the airplane being structurally intact as it approached the accident site. A postaccident examination revealed that the wing structure failed as a result of overstress. No preimpact anomalies with respect to the flight control system were identified. As a result, the steep descent was likely an intentional action by the pilot but for reasons that could not be determined.
The investigation did not have any data from which to determine the flightpath from the final data point to the accident site. However, because the final segment of the flightpath was toward the southwest and the debris path was oriented to the northeast, it is clear that the pilot attempted to pull out of the dive and, in doing so, reversed course. That maneuver, which was initiated from a steep, spiral dive and above VNE, resulted in the pilot inadvertently exceeding the ultimate load factor for the airframe. The excessive load factor caused the separation of the wings and stabilator, and a loss of control of the airplane.
Probable Cause: The pilot’s attempted recovery from a steep descent which inadvertently exceeded the ultimate load factor of the airframe and resulted in a low-level inflight breakup.
Accident investigation:
 |
|
Sources:
https://www.kmov.com/news/person-killed-in-small-plane-crash-in-macoupin-county/article_853b606c-a397-11ea-8a55-b74f72de1584.html
https://www.ksdk.com/article/news/local/madison-county-plane-crash-killed/63-4314b186-ae72-4ec6-be18-1e49406d5094https://www.riverbender.com/articles/details/names-of-four-victims-in-small-airplane-crash-in-macoupin-county-are-released-42223.cfm
NTSB
https://flightaware.com/live/flight/N8991W
https://www.airport-data.com/images/aircraft/000/215/215153.jpg (photo)
Location
Images:
Photos: NTSB
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 01-Jun-2020 00:52 | Geno | Added |
| 01-Jun-2020 06:10 | Anon. | Updated [Aircraft type, Registration, Nature, Departure airport, Source] |
| 01-Jun-2020 06:49 | RobertMB | Updated [Cn, Operator, Source, Narrative] |
| 01-Jun-2020 08:21 | Captain Adam | Updated [Total occupants, Narrative] |
| 01-Jun-2020 16:29 | gerard57 | Updated [Total fatalities, Total occupants, Source, Narrative] |
| 01-Jun-2020 16:41 | gerard57 | Updated [Phase, Damage] |
| 28-Jun-2021 13:12 | aaronwk | Updated [Time, Destination airport, Source, Narrative] |
| 25-Mar-2022 16:40 | Captain Adam | Updated [Time, Aircraft type, Departure airport, Source, Narrative, Category, Accident report, Photo] |
| 25-Mar-2022 16:40 | Captain Adam | Updated [Photo] |
| 25-Mar-2022 16:41 | Captain Adam | Updated [Destination airport, Photo] |
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