Document ID: chunk:federal_register_of_legislation:F2006B06530:body:0:p2
Version: federal_register_of_legislation:F2006B06530
Segment Type: other
Provision Reference: 
Character Range: 2944–4365

Equipment

 AD/RAD/75 (Continued)

            Note 2: FAA AD 2002-06-06 Amdt 39-12683 refers.

 Compliance: For Requirement 1 - Before 16 August 2002.

            For Requirement 2 - At the next biennial transponder check required by AD/RAD/47 Amdt 1 that occurs after 16 August 2002, or before 16 February 2003, which ever occurs first.

            For Requirement 3 - As of the effective date of this Directive. This Airworthiness Directive becomes effective on 16 May 2002.
            Background: The United Sates Federal Aviation Administration have advised that erroneous altitude resolutions could occur when the affected transponders are utilized in areas with other aeroplanes equipped with certain aircraft collision avoidance system (ACAS) or traffic alert and collision avoidance system (TCAS) configurations.

            This Directive requires modification of the transponders to prevent erroneous altitude reporting. These actions are intended to prevent the erroneous altitude resolutions from causing a reduction in the intended ACAS or TCAS Change 7 separation margins. Such a condition could result in air traffic control or the pilot making flight decisions that put the airplane in unsafe flight conditions.

 Eugene Paul Holzapfel
 Delegate of the Civil Aviation Safety Authority 28 March 2002

 The above AD is notified in the Commonwealth of Australia Gazette on 24 April 2002.