Airworthiness directives › 2020-08-11
AD 2020-08-11 Airworthiness Directives; Yaborã Indústria Aeronáutica S.A. (Type Certificate Previously Held by Embraer S.A.)
Models named: ERJ 190-300, ERJ 190-400. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to all 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.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
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) Brazilian Emergency Airworthiness Directive (EAD) 2019-12-01, effective December 9, 2019 (“Brazilian EAD 2019-12-01”).
Unsafe condition
This AD was prompted by a failure propagation test, which revealed that when complete loss of the electrical digital current (DC) essential bus 2 was induced the smoke detection system of the forward and aft electrical bays erroneously indicated the presence of smoke via the respective engine indication and crew alerting system (EICAS) messages. The FAA is issuing this AD to provide the flightcrew with revised airplane flight manual (AFM) procedures for responding to erroneous indications of smoke in the electrical bays presented on the EICAS. If the flightcrew followed the existing AFM procedures, it could result in a loss of all electrical DC essential buses, causing loss of electrical power for critical systems of the airplane.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1