AD 2024-15-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 525 | Airworthiness Directives; Textron Aviation Inc. (Type Certificate Previously Held by Cessna Aircraft Company) Airplanes |
| aircraft | Cessna | Various | Airworthiness Directives; Textron Aviation Inc. (Type Certificate Previously Held by Cessna Aircraft Company) Airplanes |
| aircraft | Textron | Aviation Inc | Airworthiness Directives; Textron Aviation Inc. (Type Certificate Previously Held by Cessna Aircraft Company) Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Textron Aviation Inc. (Type Certificate Previously Held by Cessna Aircraft Company) Airplanes |
Unsafe Condition
Failure of either of a pair of opto-isolators within the ATLAS Control Unit (ACU) can prevent an enable signal from being sent to the TACS Control Units (TCUs), resulting in un-annunciated loss of load alleviation.
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Required Actions
Install placards on the left-hand inboard edge of the Tamarack active camber surface (TACS) and revise the existing airplane flight manual (AFM) to include instructions for pre-flight checks of the ATLAS system before taxi.
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Compliance Time
Within 12 months of the effective date (October 22, 2024)
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Affected Aircraft
Textron Aviation Inc. (Type Certificate Previously Held by Cessna Aircraft Company) Model 525, 525A, and 525B airplanes with Tamarack ATLAS winglets installed per Supplemental Type Certificate (STC) No. SA03842NY.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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