COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Short SD3-60 Series Aeroplanes
AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/SD3-60/48 Amdt 1 and issues the following AD under subregulation 39.1 (1) of CAR 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.
AD/SD3-60/48
Amdt 2
Stub Wing Shear Deck and Rib Corrosion 8/2001
Applicability: All SD3-60 aircraft.
Requirement: Action in accordance with Shorts Mandatory Service Bulletin SD360-53-43 Revision 2.
Note: UK CAA AD 006-11-97 refers.
Compliance: Initial Inspection: Unless the initial inspection is already accomplished and the required drain holes embodied; before 25 September 1999.
Subsequent Inspection:
Where no corrosion is found, or where all corroded items have been replaced in accordance with the Requirement document, inspect in accordance with Aircraft Maintenance Program Chapter 5-26-57.
Where corrosion is found and remedial action taken to remove the corrosion, inspect in accordance with the Requirement document every 12 calendar months thereafter.
The compliance time for the initial inspection remains unchanged for this issue of the Directive.
This Amendment becomes effective on 9 August 2001.
Background: Corrosion has been found in the area of the lower and upper shear decks and outer and inner ribs, especially the flanges.
Amendment 1 required new drain holes in the lower shear deck, while the engineering intent of the document remained unchanged.
Amendment 2 is issued in response to a revision of the Requirement document which introduces changes to clarify repeat inspection requirements and accomplishment instructions.
COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Amendment 1 of this Airworthiness Directive became effective on 25 March 1999.
The original issue of this Airworthiness Directive became effective on 26 March 1998.
David Alan Villiers
Delegate of the Civil Aviation Safety Authority 26 June 2001
The above AD is notified in the Commonwealth of Australia Gazette on 11 July 2001.
Overview
The Civil Aviation Regulations 1998 were enacted to provide a comprehensive regulatory framework for civil aviation in Australia, ensuring that all aviation activities within the country are conducted in a safe and orderly manner. One particular aspect of these regulations is found in Part 39 - 105, which pertains to the Civil Aviation Safety Authority's Schedule of Airworthiness Directives. This part of the legislation aims to address specific safety concerns by issuing directives that require certain actions to be taken to maintain or improve the airworthiness of aircraft. The directives are issued by a delegate of the Civil Aviation Safety Authority under the authority granted by the Civil Aviation Regulations, and they are intended to ensure the continued safety of aircraft operations. The specific problem or gap these regulations address is the need to manage and mitigate safety risks associated with aircraft operations through targeted directives.
Scope and Application
The Airworthiness Directive AD/SD3-60/48 Amdt 2 applies to all SD3-60 aircraft, as specified in the Civil Aviation Regulations 1998, under the authority of the Civil Aviation Safety Authority (CASA). This directive mandates specific actions to address corrosion issues found in the lower and upper shear decks and outer and inner ribs, particularly in the flanges. The directive requires adherence to the procedures outlined in Shorts Mandatory Service Bulletin SD360-53-43 Revision 2, with references to the UK Civil Aviation Authority AD 006-11-97. Compliance with the directive involves conducting an initial inspection before 25 September 1999 unless it has already been completed and the required drain holes have been installed. For subsequent inspections, if no corrosion is detected or all corroded parts have been replaced according to the requirements, the inspection must follow the Aircraft Maintenance Program Chapter 5-26-57. If corrosion is found and remedial action is taken, the inspection must be performed every 12 calendar months. The compliance timeline for the initial inspection remains unchanged, and this amendment becomes effective on 9 August 2001.
Key Provisions
The Civil Aviation Regulations 1998 (CAR 1998), specifically within Part 39 - 105, detail the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives. This schedule mandates particular actions to ensure the safety of certain aircraft, such as the SD3-60 series aeroplanes. The Airworthiness Directive (AD) AD/SD3-60/48 Amdt 2 focuses on addressing corrosion issues in the stub wing shear deck and rib areas. The directive applies to all SD3-60 aircraft and requires action in accordance with the Shorts Mandatory Service Bulletin SD360-53-43 Revision 2. The AD references UK CAA AD 006-11-97 for further guidance.
The obligations imposed by this AD are clear and specific. Operators of SD3-60 aircraft must ensure that an initial inspection is conducted to check for corrosion before 25 September 1999 unless the inspection has already been completed and the necessary drain holes have been incorporated. If no corrosion is detected during this inspection, or if all corroded parts have been replaced as per the requirement document, a subsequent inspection must be performed in accordance with Aircraft Maintenance Program Chapter 5-26-57. If corrosion is found and remedial actions are taken to remove it, a follow-up inspection must occur every 12 calendar months. The requirement document provides detailed instructions on how these inspections and actions should be carried out.
Failure to comply with the provisions of this AD can lead to serious consequences. The AD outlines the critical timeframes and inspection protocols that must be followed to maintain the airworthiness of the aircraft. Non-compliance could result in the aircraft being deemed unfit for operation, potentially leading to enforcement actions by CASA. The AD does not specify the exact penalties or consequences for non-compliance, but it is clear that adherence is mandatory to ensure the safety and regulatory compliance of the aircraft.