COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Short SC7 (Skyvan) Series Aeroplanes AD/SC7/26 Amdt 2 Wing Attachment Bushes in Fuselage Front and Rear Spar Frames 9/99 Applicability: All model SC7 aircraft. Requirement: Inspect in accordance with Shorts Mandatory Service Bulletin 53-68 Revision 3. Note: UK CAA AD 009-01-96 refers. Compliance: Unless the initial inspection is already accomplished, inspect within 50 flights after 31 December 1998, and thereafter at the intervals specified in the Requirement Document. The initial compliance of the previous issue of this Directive remains unchanged. This Amendment becomes effective on 9 September 1999. Background: Reports were received of bush migration in the fuselage rear spar frame. This Directive requires bushes in the front and rear spars to be inspected, and where necessary, oversize bushes to be installed. Amendment 1 introduced changes to the repeat inspection interval times. Amendment 2 is issued in response to a revision of the Requirement Document which amends the text for repeat inspection requirements. Amendment 1 of this Airworthiness Directive became effective on 31 December 1998. The original issue of this Airworthiness Directive became effective on 10 October 1996.