Document ID: chunk:federal_register_of_legislation:F2010L01938:body:0:p3
Version: federal_register_of_legislation:F2010L01938
Segment Type: other
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Character Range: 5593–7439

assumptions regarding operational usage.  Information subsequently provided by, and on behalf of, the Australian Ballooning Federation, shows that some of those assumptions were incorrect and that the accumulation of fatigue damage and estimated crack propagation rates, are much less rapid than had been indicated.

   Amendment 3 deleted the blanket 25 year retirement life.  Requirement 1(b) was also amended to show that Table 6.1 (defect definitions) is part of AS 2337.1-2004, which is referenced in the inspection standard AS 2030.1-1999.  Reference to the "Maintenance Release" was been corrected to "Aircraft Log Book".

   Amendment 4 deleted the "Tare Mass Test" requirement.  Advice from Standards Australia indicated that "Tare Mass Testing" of thin walled gas cylinders was not the critical test for corrosion of this type of cylinder.

   Amendment 4 also added the caution at Note 6.  An accident caused by a valve assembly breaking during landing, resulted in a fire.  The original assembly had been replaced with another which protruded beyond the cylinder safety collar, and as a result was no longer adequately protected.

   This amendment revises the references to the current revisions of the Australian Standards.

   The basic requirements and compliance times of this directive are unchanged by this amendment.

   Amendment 4 of this Airworthiness Directive became effective on 19 June 2002.

   Amendment 3 of this Airworthiness Directive became effective on 2 November 2000.

   Amendment 2 of this Airworthiness Directive became effective on 13 July 2000.

   Amendment 1 of this Airworthiness Directive became effective in October 1987.

   The original issue of this Airworthiness Directive became effective on 18 April 1986.

David Punshon
Delegate of the Civil Aviation Safety Authority

5 July 2010