Airworthiness Directive · Amendment 39-21491 · Main landing gear
Yaborã Indústria Aeronáutica S.A. (Type Certificate Previously Held by Embraer S.A.) Airplanes
This AD applies to all Yaborã Indústria Aeronáutica S.A. Model EMB-135BJ, -135ER, -135KE, -135KL, -135LR, -145, -145ER, -145MR, -145LR, -145XR, -145MP, and -145EP airplanes, certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for all Yabor[atilde] Ind[uacute]stria Aeron[aacute]utica S.A. Model EMB-135 and EMB-145 airplanes. This AD was prompted by a report involving disconnection of a side arm strut from the right main landing gear (MLG); a subsequent investigation found that the side arm strut lower bearing was installed inverted on the airplane. This AD requires doing a general visual inspection of the right and left MLG to verify certain conditions and doing all applicable on-condition actions, as specified in an Ag[ecirc]ncia Nacional de Avia[ccedil][atilde]o Civil (ANAC) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, Agência Nacional de Aviação Civil (ANAC) AD 2021-02-02, effective February 26, 2021; corrected February 26, 2021 (ANAC AD 2021-02-02).
(1) Where ANAC AD 2021-02-02 refers to its effective date, this AD requires using the effective date of this AD.
(2) The “Alternative method of compliance (AMOC)” section of ANAC AD 2021-02-02 does not apply to this AD.
(3) Paragraph (c) of ANAC AD 2021-02-02 specifies to report inspection results to ANAC and Yaborã Indústria Aeronáutica S.A. within a certain compliance time. For this AD, report inspection results only if any discrepancies (i.e., positioning of the grease fittings is incorrect, installation of the bearings are inverted, bearings have migrated) are found at the applicable time specified in paragraph (h)(3)(i) or (ii) of this AD.
(i) If the inspections were done on or after the effective date of this AD: Submit the report within 10 days after the inspection.
(ii) If the inspections were done before the effective date of this AD: Submit the report within 10 days after the effective date of this AD.
(4) Where figure 2 of ANAC AD 2021-02-02 specifies an “arrow indication,” this AD allows installation of all spherical bearings with arrows missing and/or with evidence of spherical bearing rotation (arrows misaligned with the MLG lower side arm center line), provided that the spherical bearings are original equipment manufacturer (OEM) units.
(5) Where paragraph (a) of ANAC AD 2021-02-02 states to “refer to” certain airplane maintenance manual (AMM) and component maintenance manual (CMM) procedures for removal and installation of the MLG lower side arm and the MLG side arm bearings, this AD requires those AMM and CMM procedures. Therefore, those actions must be done in accordance with the applicable AMM and CMM procedures specified in ANAC AD 2021-02-02.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
