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Sat, Feb 27, 2021

AD: Yaborã Industria Aeronáutica S.A.

AD 2021-04-09 Requires Updating The Software Of The Installed FADEC Systems

The FAA is adopting a new airworthiness directive (AD) for certain Yaborã Industria Aeronáutica S.A. Model EMB-135, EMB-145, -145EP, -145ER, -145LR, -145MP, -145MR, and -145XR airplanes.

This AD was prompted by reports that calculations provided by the automatic takeoff thrust control system (ATTCS) are incorrect under certain conditions. This AD requires updating the software of the installed full authority digital engine control (FADEC) systems, as specified in an Agência Nacional de Aviação Civil (ANAC) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products. This AD is effective March 30, 2021.

Supplementary Information: The ANAC, which is the aviation authority for Brazil, has issued ANAC AD 2020-07-02, effective July 21, 2020 (ANAC AD 2020-07-02) (also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI), to correct an unsafe condition for certain Yaborã Industria Aeronáutica S.A. Model EMB-135, EMB-145, -145EP, -145ER, -145LR, -145MP, -145MR, and -145XR airplanes. Model EMB-145EU, EMB-145LU, and EMB-145MK airplanes are not certificated by the FAA and are not included on the U.S. type certificate data sheet; this AD therefore does not include those airplanes in the applicability.

The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to certain Yaborã Industria Aeronáutica S.A. Model EMB-135, EMB-145, -145EP, -145ER, -145LR, -145MP, -145MR, and -145XR airplanes. The NPRM published in the Federal Register on November 27, 2020 (85 FR 75964). The NPRM was prompted by reports that calculations provided by the ATTCS are incorrect under certain conditions. The NPRM proposed to require updating the software of the installed FADEC systems, as specified in ANAC AD 2020-07-02.

FMI: www.regulations.gov

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