Airworthiness Directive · Amendment 39-19442 · Navigation
Airbus SAS Airplanes
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.
We are superseding Airworthiness Directive (AD) 2018-02-18, which applied to certain Airbus SAS Model A318, A319, and A320 series airplanes and Model A321-111, -112, -131, -211, -212, -213, -231, and - 232 airplanes. AD 2018-02-18 required revising the airplane flight manual (AFM) to provide guidance to the flightcrew for certain emergency procedures. This new AD requires revising the AFM, and for certain airplanes, removing a certain AFM revision. This AD also adds airplanes to the applicability. 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. This AD was also prompted by a determination that the AFM needs to be revised for certain additional airplanes, and that the AFM may have been erroneously revised on certain airplanes not equipped with a BUSS function. We are issuing this AD to address the unsafe condition on these products.
(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.
(1) For Group 1 airplanes, except for airplanes identified in paragraph (i) of this AD: Within 30 days after the effective date of this AD, revise the AFM to incorporate the procedure specified in figure 1 to paragraphs (h) and (i) of this AD.
(2) For Group 2 airplanes: Within 30 days after the effective date of this AD, revise the AFM by removing the procedure specified in figure 1 to paragraphs (h) and (i) of this AD from the AFM.++
Airplanes operated with an AFM having the NAV-ADR 1+2+3 FAULT procedure identical to the procedure specified in figure 1 to paragraphs (h) and (i) of this AD, with an approval date on or after March 2, 2017, are compliant with the requirements of this AD, provided that the procedure is not removed from the AFM.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
