Airworthiness directives › 2021-04-11
AD 2021-04-11 Airworthiness Directives; Airbus SAS Airplanes
Models named: A350-941. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Airbus SAS Model A350-941 airplanes, certificated in any category, as identified in European Union Aviation Safety Agency (EASA) AD 2020-0167, dated July 27, 2020 (EASA AD 2020-0167).
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, EASA AD 2020-0167.
Unsafe condition
This AD was prompted by a determination through testing that ram air turbine (RAT) performance may be below the expected (certificated) level when the landing gear is extended, and by the development of a modification that forces the air generation system (AGS) ram air outlet doors to be flush in cases of total engine flameout or loss of the main electrical supply. The FAA is issuing this AD to address RAT performance that may be below the expected (certificated) level when the landing gear is extended, which could lead to partial or total loss of RAT electrical power generation when the RAT is deployed in an emergency situation, possibly resulting in reduced control of the airplane.
Affected ADs
This AD replaces AD 2020-01-10, Amendment 39-19816 (85 FR 6747, February 6, 2020) (AD 2020-01-10).
Read the original on the Federal Register →
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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