Document ID: chunk:federal_register_of_legislation:F2007L03662:body:0:p2
Version: federal_register_of_legislation:F2007L03662
Segment Type: other
Provision Reference: 
Character Range: 2873–4587

failure of the mounting base of the CPT 609 crash position transmitter beacon antenna.  The failures have been determined to be caused by vibration.  Failure of the antenna will significantly reduce the radiated power of the crash position transmitter and loss of the antenna during flight may jeopardize the safety of persons on the ground.
             The original issue of this Directive required the antenna to be inspected for integrity after each flight and, if necessary, the replacement of any defective antenna.
             The European Aviation Safety Agency (EASA) has advised that following studies of the vibration phenomena, the antenna manufacturer has developed a new antenna, fitted with a mounting base which is not subject to failure due to vibrations. Eurocopter have revised their ASB 05.00.53 accordingly to instruct the replacement of existing antennas with the new P/N 070-0609-022 antenna as terminating action for the post-flight inspections.
             Amendment 1 retained the repetitive inspection requirements and required the replacement of all P/N 070-0609-021 antennas with P/N 070-0609-022 antennas, after which the post-flight inspections can be discontinued.  In addition, Amendment 1 prohibited the (re)installation of P/N 070-0609-021 on any of the affected helicopters after 30 September 2007.
             This Amendment continues the requirements of Amendment 1 but revised the compliance date for Requirement 3 and 4 to 15 November 2007.
             The original issue of this Directive became effective on 26 May 2006.
             Amendment 1 became effective on 30 August 2007.

Charles Lenarcic
Delegate of the Civil Aviation Safety Authority

12 September 2007