AD 2020-25-08 Requires Installing Supports For The Horizontal Stabilizer Control Yoke Pitch Trim Switches

The FAA is adopting a new airworthiness directive (AD) for certain Yaborã Industria Aeronáutica S.A. Model ERJ 170 airplanes and Model ERJ 190-100 STD, -100 LR, -100 ECJ, -100 IGW, -200 STD, -200 LR, and -200 IGW airplanes.

This AD was prompted by reports of installation of inverted poles of the horizontal stabilizer pitch trim switches on the control yokes, which causes opposite commands for the horizontal stabilizer. This AD requires installing supports for the horizontal stabilizer control yoke pitch trim switches and re-identifying the control yokes, as specified in two Agência Nacional de Aviação Civil (ANAC) ADs, which are incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products. This AD is effective January 21, 2021.

Supplementary Information: The ANAC, which is the aviation authority for Brazil, has issued ANAC AD 2020-05-01, effective May 26, 2020; and ANAC AD 2020-05-02, effective May 26, 2020 (ANAC AD 2020-05-01 and ANAC AD 2020-05-02) (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 ERJ 170 airplanes and Model ERJ 190-100 STD, -100 LR, -100 ECJ, -100 IGW, -100 SR, -200 STD, -200 LR, and -200 IGW airplanes. Model ERJ 190-100 SR 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 ERJ 170 airplanes and Model ERJ 190-100 STD, -100 LR, -100 ECJ, -100 IGW, -200 STD, -200 LR, and -200 IGW airplanes. The NPRM published in the Federal Register on September 17, 2020 (85 FR 58004). The NPRM was prompted by reports of installation of inverted poles of the horizontal stabilizer pitch trim switches on the control yokes, which causes opposite commands for the horizontal stabilizer. The NPRM proposed to require installing supports for the horizontal stabilizer control yoke pitch trim switches and re-identifying the control yokes, as specified in ANAC AD 2020-05-01 and ANAC AD 2020-05-02.

The FAA is issuing this AD to address inverted poles of the horizontal stabilizer pitch trim switches on the control yokes, which could result in reduced controllability of the airplane. See the MCAI for additional background information.

FMI: www.regulations.gov