Airworthiness Directive · Amendment 39-21601 · Electrical power
Yaborã Indústria Aeronáutica S.A. (Type Certificate Previously Held by Embraer S.A.) Airplanes
This AD applies to Yaborã Indústria Aeronáutica S.A. (type certificate previously held by Embraer S.A.) Model ERJ 190-300 and ERJ 190-400 airplanes, certificated in any category, identified in Agência Nacional de Aviação Civil (ANAC) AD 2021-02-01, effective February 15, 2021; corrected February 23, 2021 (ANAC AD 2021-02-01).
The FAA is superseding Airworthiness Directive (AD) 2020-08- 11, which applied to all Yabor[atilde] Ind[uacute]stria Aeron[aacute]utica Model ERJ 190- 300 and ERJ 190-400 airplanes. AD 2020-08-11 required revising the existing airplane flight manual (AFM) procedures associated with messages of smoke in the electronic bays presented on the respective engine indication and crew alerting system (EICAS). This AD continues to require revising the existing AFM procedures, and adds requirements for a terminating modification of the electrical wiring of the mid- electronic bay and backup smoke detectors; as specified in an Ag[ecirc]ncia Nacional de Avia[ccedil][atilde]o Civil (ANAC) AD, which is incorporated by reference. This AD was prompted by a failure propagation test, which revealed that under certain conditions, the smoke detection system of the electrical bays erroneously indicated the presence of smoke via the respective EICAS messages. 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, ANAC AD 2021-02-01.
(1) Where ANAC AD 2021-02-01 refers to its effective date, this AD requires using the effective date of this AD.
(2) Where ANAC AD 2021-02-01 refers to December 9, 2019 (the effective date of ANAC Emergency AD 2019-12-01), this AD requires using May 22, 2020 (the effective date of AD 2020-08-11).
(3) The “Alternative Methods of Compliance (AMOC)” section of ANAC AD 2021-02-01 does not apply to this AD.
(4) Where Part II, paragraph (b)(2), of ANAC AD 2021-02-01 specifies that after modification of the electrical wiring of the mid electronic bay and backup smoke detectors the temporary airplane flight manual (AFM) revisions “must be removed,” this AD requires removing the temporary AFM revisions before further flight after completing the modification required by Part II, paragraph (b)(1), of ANAC AD 2021-02-01.
