COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Short SD3-60 Series Aeroplanes
AD/SD3-60/56 Air Conditioner System Wiring 7/99
Applicability: All SD3-60 aircraft that have incorporated Shorts Service Bulletin (SB) SD360-21-21 Original Issue dated August 1994.
Requirement: 1. If not previously accomplished, rewire the aeroplane in accordance with Shorts SB SD360-21-21 Revision 1 dated June 1998.
Note: CAA(UK) AD 011-03-99 and Shorts Mandatory Service Bulletin SD360-21-23 dated 4 March 1999 refers.
Compliance: 1. Before 15 August 1999.
This Airworthiness Directive becomes effective on 15 July 1999.
Background: Incorporation of Shorts SB SD360-21-21 Original Issue resulted in wiring changes that inhibited the generator failure slave relay from being energised, this resulted in both load shedding busbars not being able to be brought back on line when override is selected.
Rewiring in accordance with Revision 1 of the service bulletin restores correct operation of the generator failure slave relay.
Overview
The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, serve to regulate civil aviation safety and operations within the country. One of the critical components of these regulations is the issuance of Airworthiness Directives (ADs) to address specific safety concerns. AD/SD3-60/56, introduced in 1999, pertains to the rewiring of the air conditioner system in all SD3-60 series aeroplanes that have incorporated the Shorts Service Bulletin (SB) SD360-21-21. This directive was prompted by an issue where the incorporation of the original service bulletin caused a malfunction in the generator failure slave relay, thereby inhibiting the ability to restore the load shedding busbars when an override was selected. The objective of AD/SD3-60/56 is to rectify this issue by mandating a rewiring of the aeroplane in accordance with the revised service bulletin, ensuring the aircraft's airworthiness and operational safety. Compliance with this directive is required before 15 August 1999, with the directive itself becoming effective on 15 July 1999.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105 and the Civil Aviation Safety Authority Schedule of Airworthiness Directives, pertain to the maintenance and safety of aircraft within the Commonwealth of Australia. This particular legislation, AD/SD3-60/56, focuses on Short SD3-60 Series Aeroplanes and mandates the rewiring of the air conditioner system to ensure the aircraft’s airworthiness. The directive applies to all SD3-60 aircraft that have incorporated the Shorts Service Bulletin (SB) SD360-21-21 Original Issue dated August 1994. The requirement is that these aircraft must be rewired in accordance with Shorts SB SD360-21-21 Revision 1 dated June 1998 if such rewiring has not already been accomplished. This directive references CAA(UK) AD 011-03-99 and Shorts Mandatory Service Bulletin SD360-21-23 dated 4 March 1999. Compliance with this directive is mandatory, with the rewiring needing to be completed before 15 August 1999. This Airworthiness Directive became effective on 15 July 1999, underscoring the urgency and importance of the rewiring to address safety concerns arising from wiring changes that inhibited the generator failure slave relay from being energised.
Key Provisions
The Civil Aviation Regulations 1998, under Part 39, Section 105, provide specific airworthiness directives that ensure the safety and reliability of aircraft. Specifically, Airworthiness Directive (AD) SD3-60/56 pertains to the air conditioner system wiring of all SD3-60 series aeroplanes (Section 1). This directive applies to aircraft that have implemented Shorts Service Bulletin (SB) SD360-21-21 Original Issue dated August 1994 (Section 2). The primary requirement of this directive is that if the specified wiring modification has not already been performed, the aeroplane must be rewired in accordance with Shorts SB SD360-21-21 Revision 1 dated June 1998 (Section 3). This rewiring is crucial to rectify a previous issue where the generator failure slave relay was not properly energised, resulting in the inability to restore the load shedding busbars when an override is selected. Compliance with this directive must be achieved before 15 August 1999 (Section 4).
Entities governed by this Act, primarily aircraft operators and maintenance organisations, must ensure that any SD3-60 series aeroplanes within their fleet that have incorporated Shorts SB SD360-21-21 Original Issue are rewired as specified by AD SD3-60/56. This involves following the detailed instructions outlined in Shorts SB SD360-21-21 Revision 1, which was issued to address the identified wiring problem. The rewiring is essential to restore the correct operation of the generator failure slave relay and to ensure that the load shedding busbars can be brought back online when required. Failure to comply with this directive could result in safety issues and non-compliance with aviation safety standards.
Failure to comply with AD SD3-60/56 may lead to significant consequences. Firstly, non-compliance could result in the aircraft being deemed unairworthy, which means it cannot legally be operated until the required modifications are made. Additionally, operators who fail to adhere to airworthiness directives may face penalties, including fines and potential legal action. The severity of penalties may vary depending on the extent of the non-compliance and any resultant safety incidents. While specific maximum penalties are not detailed in the directive, regulatory enforcement could lead to significant financial and operational repercussions for non-compliant entities.