Airworthiness Directive · Amendment 39-19171 · Navigation
Airbus Airplanes
Superseded. A later AD replaced this one: AD 2018-20-08. Comply with the one in force.
This AD applies to the Airbus airplanes identified in paragraphs (c)(1) through (c)(4) of this AD, certificated in any category, all manufacturer serial numbers on which Airbus modification 35871 has been embodied in production or Airbus Service Bulletin A320-34-1397 has been embodied in service, 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.
(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 adopting a new airworthiness directive (AD) for certain Airbus Model A318, A319, and A320 series airplanes and Model A321-111, -112, -131, -211, -212, -213, -231, -232 airplanes. This AD requires revising the airplane flight manual (AFM) to provide guidance to the flight crew for emergency procedures when erroneous airspeed indications are displayed on the back-up speed scale (BUSS). 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 BUSS could be erroneous. We are issuing this AD to address the unsafe condition on these products.
Except for airplanes identified in paragraph (h) 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 (g) and (h) of this AD, and thereafter operate the airplane accordingly. When a procedure identical to that in figure 1 to paragraphs (g) and (h) of this AD has been included in the general revisions of the AFM, the general revisions may be inserted into 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 (g) and (h) 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 specified in figure 1 to paragraphs (g) and (h) of this AD 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.
