Airworthiness Directive · Amendment 39-18606 · Navigation
Airbus Airplanes
This AD applies to the following Airbus airplanes, certificated in any category.
(1) Airbus Model A330-201, -202, -203, -223, -243, -223F, -243F, -301, -302, -303, -321, -322, -323, -341, -342, and -343 airplanes, all manufacturer serial numbers on which Airbus Modification 202097 (T3CAS Standard 1.1) or Modification 202849 (T3CAS Standard 1.2) has been embodied in production; or Airbus Service Bulletin A330-34-3271; Airbus Service Bulletin A330-34-3286; or Airbus Service Bulletin A330-34-3301 have been embodied in-service.
(2) Airbus Model A340-211, -212, -213, -311, -312, and -313 airplanes, all manufacturer serial numbers on which Airbus Service Bulletin A340-34-4282 (T3CAS Standard 1.2) has been embodied in-service.
We are adopting a new airworthiness directive (AD) for certain Airbus Model A330-200, -200 Freighter and -300 series airplanes; and Model A340-200 and -300 series airplanes. This AD was prompted by reports of spurious terrain awareness warning system (TAWS) alerts during approach and takeoff for airplanes fitted with the terrain and traffic collision avoidance system with transponder (T3CAS) when the T3CAS is constantly powered "ON" for more than 149 hours. This AD requires repetitive on-ground power cycle of the T3CAS. We are issuing this AD to prevent spurious TAWS alerts (collision prediction and alerting (CPA)), or missing legitimate CPA, which could increase flight crew workload during critical landing or takeoff phases, and could possibly result in reduced control of the airplane.
For Model A330 and A340 airplanes equipped with a T3CAS unit having a part number specified in paragraph (g)(1) or (g)(2) of this AD: Within 30 days after the effective date of this AD, or within 120 hours of continuous power of the T3CAS after installation of the T3CAS, as specified in any applicable service information in paragraph (h) of this AD, whichever occurs later, do an on-ground power cycle of the T3CAS, in accordance with the instructions of Airbus Alert Operators Transmission (AOT) A34L003-13, Revision 01, dated May 26, 2015. Thereafter, repeat the on-ground power cycle of the T3CAS at intervals not to exceed 120 hours of continuous power of the T3CAS.
(1) Affected T3CAS Units are those having part number (P/N) 9005000-10101, Software Standard 1.1.
(2) Affected T3CAS Units are those having P/N 9005000-10202, Software Standard 1.2.
Paragraphs (h)(1) through (h)(4) of this AD identify the service information that was used to install the T3CAS, as specified in paragraph (g) of this AD.
(1) Airbus Service Bulletin A330-34-3271.
(2) Airbus Service Bulletin A330-34-3286.
(3) Airbus Service Bulletin A330-34-3301.
(4) Airbus Service Bulletin A340-34-4282.
As of the effective date of this AD, installation on an airplane of a T3CAS unit having a part number specified in paragraph (g) of this AD is acceptable, provided that, following installation, the T3CAS unit is power cycled on a recurrent basis, as required by paragraph (g) of this AD.
