Maintenance and Modifications
FAA Proposes AD on Tamarack Aerospace Winglet Mod
The AD would require installation of placards and a flight manual update
Tamarack Aerospace winglet modification
© Tamarack Aerospace

The FAA has issued a proposed airworthiness directive (AD) that would require owners of Cessna Citations modified with Tamarack Aerospace winglet systems to comply with a Tamarack service bulletin issued on April 19, 2023. The bulletin calls for installation of placards on the winglets’ Tamarack active camber surface (TACS) as well as a revision to the airplane flight manual (AFM) supplement.

Tamarack’s autonomous load alleviation system (Atlas) modifies CitationJet 525, 525A, and 525B models with winglets and the TACS, which actuate during flight to reduce the increased load on the wings caused by the winglets.