Document ID: chunk:federal_register_of_legislation:F2006B04624:body:0:p2
Version: federal_register_of_legislation:F2006B04624
Segment Type: other
Provision Reference: 
Character Range: 2797–4522

tail boom strike during flight; pending further engineering towards reinstatement of 140 KIAS Vne.
 COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
 SCHEDULE OF AIRWORTHINESS DIRECTIVES

            Amendment 1 mandated the technical provisions of ASB 407-99-27, and allowed an increased Vne of 130 KIAS up to 20 degrees C and 125 KIAS above 20 degrees C.

            Amendment 2 allowed an increase in Vne to 130 KIAS above 20 degrees C, as a result of flight tests at elevated temperatures.

            Amendment 3 required installation (before 31 January 2001) of a pedal stop which repositioned itself relative to airspeed, and so provided terminating action for the Directive.

            Amendment 4 was prompted by an accident in which a helicopter flying at 140 knots was destroyed by suspected tail rotor strike to the tail boom. Pending further evaluation of the accident, to minimise the risk of a tail boom strike during flight, the never-exceed speed (Vne) is to be reduced.

            Amendment 5 is issued in response to a revision of the related Transport Canada AD which removes the current Vne restriction imposed as a result of an accident. The accident investigation has revealed no data to confirm a tail rotor strike as the cause.

            Amendment 4 of this Directive became effective on 12 January 2001. Amendment 3 of this Directive became effective on 18 May 2000.
            The original issue of this Directive became effective on 20 May 1999.

 David Alan Villiers
 Delegate of the Civil Aviation Safety Authority 19 April 2001

 The above AD is notified in the Commonwealth of Australia Gazette on 26 April 2001.