Document ID: chunk:federal_register_of_legislation:F2007L04510:body:0:p2
Version: federal_register_of_legislation:F2007L04510
Segment Type: other
Provision Reference: 
Character Range: 2782–3963

hours time in service after 20 December 2007, unless already accomplished.
                This Amendment becomes effective on 20 December 2007.

Background:  The FAA received reports of five occurrences of missing tail rotor blade forward tip weight retention blocks or aft tip closures that resulted in minor to substantial damage.  Such damage could result in loss of a tail rotor blade, and subsequent loss of control of the helicopter.

             Amendment 1 included the Agusta Model AB412 helicopter in applicability, and update Applicability and Requirement information to the latest manufacturer's documentation.

             Amendment 2 is issued in response to a new FAA AD, which expands the applicability to include other part and serial-numbered blades.  Additionally, the AD clarifies the requirement to re-identify the modified blade by adding "FM" after the part number, and requires dynamically balancing the tail rotor.  The previously included requirements for Agusta Model AB412 helicopters have been relocated to a new Bell 412 Series Helicopter AD in Issue 13/2007.

David Villiers
Delegate of the Civil Aviation Safety Authority

7 November 2007