ASN Wikibase Occurrence # 261291
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| Date: | Saturday 15 May 2021 |
| Time: | 21:15 LT |
| Type: |  Cirrus SR22 |
| Owner/operator: | Private |
| Registration: | N4144B |
| MSN: | 0131 |
| Total airframe hrs: | 3637 hours |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Kettle Moraine State Forest, Kewaskum, WI -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Sheboygan Memorial Airport, WI (SBM/KSBM) |
| Burlington Municipal Airport, WI (KBUU) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that, during an instrument flight rules flight, he began receiving conflicting information from the flight instruments and digital flight information display. He stated that the turn coordinator and GPS were displaying opposite information, the heading bug was moving erratically, and he felt as if he was flying in circles. After determining that he could not rely on the information from the flight instruments, he elected to activate the Cirrus Airframe Parachute System (pull #125). The airplane came to rest in a stand of trees, resulting in substantial damage.
Postaccident testing of the electronic horizonal situation indicator, directional gyro, and horizon reference indicator revealed no anomalies except for the directional gyro counterclockwise heading stability, which exceed the testing limits by about 3°. The heading stability finding, although outside the testing limits, would not result in the instrument anomalies reported by the pilot. The reason for the flight instrument disagreement/malfunction could not be determined based on the available information.
Probable Cause: An inflight instrument malfunction for reasons that could not be determined based on available information, which led to the pilot's decision to activate the airframe parachute system.
Sources:
NTSB CEN21LA232
FAA register: https://registry.faa.gov/aircraftinquiry/Search/NNumberResult?nNumberTxt=4144B
https://flightaware.com/live/flight/N4144B/history/20210516/0130Z/KSBM/KBUU
Accident investigation:
 |
|
Images:
Photo: FAA
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 16-May-2021 15:00 | Geno | Added |
| 17-May-2021 00:02 | RobertMB | Updated [Time, Aircraft type, Registration, Cn, Operator, Phase, Nature, Departure airport, Destination airport, Source, Damage, Narrative] |
| 17-May-2021 07:28 | Captain Adam | Updated [Damage, Narrative] |
| 17-May-2021 08:21 | RobertMB | Updated [Damage, Narrative] |
| 17-May-2021 15:29 | Captain Adam | Updated [Source, Damage, Narrative] |
| 17-May-2021 15:38 | RobertMB | Updated [Source, Narrative] |
| 17-May-2021 15:49 | RobertMB | Updated [Damage] |
| 17-May-2021 17:49 | harro | Updated [Damage, Narrative] |
| 21-Aug-2022 19:06 | ASN Update Bot | Updated [Time, Other fatalities, Source, Narrative, Category, Accident report] |
| 21-Aug-2022 19:11 | harro | Updated [Other fatalities, Source, Narrative, Photo] |
Corrections or additions? ... Edit this accident description
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