Airworthiness Directive · Amendment 39-19489 · 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, if modified by H4 Aerospace Supplemental Type Certificate (STC) ST03708NY or PMV Engineering STC ST03835NY.
(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, -231, -232, and -233 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 SAS Model A318 and A319 series airplanes; Model A320-211, -212, -214, -231, -232, and -233 airplanes; and Model A321-111, -112, -131, - 211, -212, -213, -231, and -232 airplanes. This AD was prompted by reports of false resolution advisories (RAs) from certain traffic collision avoidance systems (TCASs). This AD requires modification or replacement of certain TCAS processors. We are issuing this AD to address the unsafe condition on these products.
For the purposes of this AD, an affected TCAS processor is defined as a Honeywell TPA-100B TCAS processor having part number (P/N) 940-0351-001.
Within 12 months after the effective date of this AD: Update the software of the affected TCAS processor and change the part number to P/N 940-0351-005, or replace the affected TCAS processor with a TPA-100B TCAS processor P/N 940-0351-005, in accordance with the Accomplishment Instructions of H4 Aerospace Service Bulletin H4ASB009, Issue 1, dated September 18, 2017; or PMV Engineering Service Bulletin AVI-00690-SB-S99-R01, Revision 01, dated October 5, 2017; as applicable.
Note 1 to paragraph (h) of this AD: Guidance for accomplishing the actions required by paragraph (h) of this AD can be found in Honeywell Service Bulletin 940-0351-34-0005, Revision 2, dated December 1, 2017.
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.
