Document ID: chunk:federal_register_of_legislation:F2005L03889:body:0:p2
Version: federal_register_of_legislation:F2005L03889
Segment Type: other
Provision Reference: 
Character Range: 3068–4903

AD to:
                 Manager,
                 New Technologies and Systems Section
                 Manufacturing, Certification and New Technologies Office
                 Civil Aviation Safety Authority,
                 GPO Box 2005, Canberra, ACT 2601

                 Fax (02) 6217 1903 or (02) 6217 1442

                 Email: airworthiness.directives@casa.gov.au

                 5. Do not install hubs listed in Table 1 of this AD.

              Note 3:  McCauley Alert Service Bulletin No. ASB251A, dated 28 September, 2005 pertains to this AD.

              Note 4:  FAA AD 2005-24-09 Amdt 39-14389 refers.
Compliance:   For Requirements 1, 2 and 3:  Within 10 flight hours or 10 calendar days after the effective date of this AD whichever occurs first.

              For Requirement 4:  Within 10 calendar days after the completion of the inspection detailed in Requirement 2 of this AD.

              For Requirement 5:  After the effective date of this AD.
              This Airworthiness Directive becomes effective on 15 December 2005.

Background:  In August of 2005, McCauley Propeller Systems reported to the FAA that a repair facility had found a single, new, unused propeller hub with improperly machined socket retention threads.  Further investigation revealed that McCauley Propeller Systems had improperly machined socket retention threads on 40 propeller hubs, manufactured in 2004 and 2005.  Using a propeller hub with improperly machined socket retention threads could cause concentrated loading on the threads, resulting in cracking of the hub and blade separation.  This condition, if not corrected, could result in failure of the propeller hub, blade separation, and loss of control of the aeroplane.

James Coyne
Delegate of the Civil Aviation Safety Authority

1 December 2005