Airworthiness directives › 2018-20-08
AD 2018-20-08 Airworthiness Directives; Airbus SAS Airplanes
Models named: A318-111, -112, -121, -122, A319-111, -113, -114, -115, -131, -132. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to the Airbus SAS airplanes identified in paragraphs (c)(1) through (c)(4) of this AD, certificated in any category, all manufacturer serial numbers. (1) Model A318-111, -112, -121, and -122 airplanes. (2) Model A319-111, -112, -113, -114, -115, -131, -132, and -133 airplanes. (3) Model A320-211, -212, -214, -216, -231, -232, -233, -251N, and -271N airplanes. (4) Model A321-111, -112, -131, -211, -212, -213, -231, and -232 airplanes.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Group 1 airplanes are those on which Airbus modification 35871 has been embodied in production, or Airbus Service Bulletin A320-34-1397 or Airbus Service Bulletin A320-34-1543 has been embodied in service (introducing air data monitoring and BUSS function), except airplanes on which Airbus modification 159281 has also been embodied in production, or Airbus Service Bulletin A320-34-1658 or Airbus Service Bulletin A320-34-1659 has also been embodied in service (installing reversible BUSS function). (2) Group 2 airplanes are those that are not in Group 1 and that have amended the AFM as previously specified in EASA AD 2017-0257, dated December 22, 2017.
Unsafe condition
This AD was prompted by a determination that, when two angle of attack (AoA) sensors are adversely affected by icing conditions at the same time, data displayed on the back-up speed scale (BUSS) could be erroneous. We are issuing this AD to address erroneous airspeed data displays, which could lead to an increased flightcrew workload, possibly resulting in reduced control of the airplane.
Affected ADs
This AD replaces AD 2018-02-18, Amendment 39-19171 (83 FR 5182, February 6, 2018) (“AD 2018-02-18”).
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