AD/AT/21 Amdt 3 - Wing Lower Spar Cap Safe Life - 2 (Cth)

AIRWORTHINESS DIRECTIVE On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/AT/21 Amdt 2 and issues the following AD under subregulation 39.001(1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Airtractor AT-300, 400 and 500 Series Aeroplanes AD/AT/21 Amdt 3 Wing Lower Spar Cap Safe Life - 2 2/2007

Applicability: Models AT-501, AT-502, AT-502A, AT-502B, and AT-503A aircraft. Requirement: 1. The following table specifies the safe life of the wing lower spar cap for affected aircraft that do not incorporate and never have incorporated Marburger Enterprises Inc. winglets. Retire at or before reaching the safe lives listed. Model Serial Numbers Safe Life AT-501 0002 through 0061 4,531 hours TIS AT-501 0062 and subsequent 7,693 hours TIS AT-502 0003 and subsequent 1,650 hours TIS AT-502A 0158 and subsequent 1,650 hours TIS AT-502B 0187 through 0654, except 0643 1,650 hours TIS AT-502B 6243, and 0655 through 0692 9,000 hours TIS AT-502B 0693 through 0701 9,500 hours TIS AT-502B 0702 and subsequent 9,800 hours TIS AT-503A 0067 and subsequent 1,650 hours TIS