Airworthiness directives › 2021-12-14
AD 2021-12-14 Airworthiness Directives; Yaborã Indústria Aeronáutica S.A. (Type Certificate Previously Held by Embraer S.A.) Airplanes
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 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).
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, ANAC AD 2021-02-01.
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, and by the determination that a terminating modification is necessary to correct the root cause of the unsafe condition. The FAA is issuing this AD to address the potential loss of all electrical DC essential buses, and consequent loss of electrical power for critical systems of the airplane.
Affected ADs
This AD replaces AD 2020-08-11, Amendment 39-19903 (85 FR 27112, May 7, 2020) (AD 2020-08-11).
Read the original on the Federal Register →
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