Document ID: chunk:federal_register_of_legislation:F2008L01625:body:0:p2
Version: federal_register_of_legislation:F2008L01625
Segment Type: other
Provision Reference: 
Character Range: 2894–4505

intervals not to exceed 55 flight hours.

                  c. At the next ALF-check after 18 February 2004.  Thereafter at intervals not to exceed 55 flight hours.

                  2. a. Upon accumulating 7,300 flight cycles.  Thereafter at intervals not to exceed 55 flight hours.

                  b. At the next ALF-check after 18 February 2004.  Thereafter at intervals not to exceed 55 flight hours.

                  c. At the next ALF-check after 18 February 2004.  Thereafter at intervals not to exceed 55 flight hours.

             The compliance times remain unchanged by this issue of the Directive.
             This Amendment becomes effective on 5 June 2008.
Background:  A crack was discovered on the main gearbox (MGB) base plate of an AS 365 N2 helicopter.  The crack was detected in the MGB base plate, close to the attachment of one of the laminated pads, running to the inside of the MGB base plate and then to the MGB casing.  Undetected crack growth could lead to the loss of rotor torque-to-structure transfer function.

             Amendment 1 replaced the previous AOT Requirement documents with ASB Requirement documents, with no change to technical content; and extended the repeat inspection intervals.

             Amendment 2 is issued to introduce the current EASA AD related to this Directive, which clarifies helicopter applicability; with no change to technical requirements.

   The original issue of this Airworthiness Directive became effective on
   18 February 2004.

David Villiers
Delegate of the Civil Aviation Safety Authority

15 April 2008