This past March, the NTSB and FAA did something we just don’t see often: They reversed previous conclusions about the cause of an accident, which in the initial investigation also implicated an aftermarket STC-approved modification as causing the accident. Flash back to 2018 when a Cessna CitationJet crashed near Memphis, killing the occupants and creating even more controversy because the Citation was equipped with aftermarket ATLAS active winglets made by Tamarack Aerospace.
The Tamarack winglets are paired with control surfaces on the extended outboard trailing edge area of each wing (pictured below) that act as automated ailerons. Sensors monitor the wing loading, deploying a spoiler for dumping lift and relieving the wing structure of overload.