AD/DC4/12 - Main Undercarriage Door - Rework

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Legislation au F2006B08817 In force Legislative Instrument

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

 


Douglas DC4 Series Aeroplanes

 

 

AD/DC4/12

Main Undercarriage Door - Rework

NK

Document:

1. Douglas SB (DC4) No. 15, dated 30 September 1946; or

 

 

2. ANO 105.1.16.2.5.11, Issue 2.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, serve to regulate civil aviation operations within the country. This comprehensive set of regulations includes provisions on aircraft operations, licensing, maintenance, and airworthiness. The specific legislative instrument F2006B08817 pertains to the Airworthiness Directives (ADs) issued by the Civil Aviation Safety Authority (CASA) under the authority conferred by the Civil Aviation Act 1988. The ADs are designed to ensure that civil aircraft in Australian airspace meet the necessary safety standards. One such directive, AD/DC4/12, targets the rework of the main undercarriage door of Douglas DC4 Series aeroplanes. This directive was introduced to address specific safety concerns related to the structural integrity of the main undercarriage door, aiming to mitigate any potential risks that could compromise the aircraft's safety during operation. The policy objective is to maintain and enhance the safety of civil aviation by enforcing rigorous airworthiness standards.

Scope and Application

The Civil Aviation Regulations 1998, under Part 39 - 105, specifically AD/DC4/12, pertains to the airworthiness directives for the Douglas DC4 Series aeroplanes, focusing on the rework required for the main undercarriage door. This regulation applies to all Douglas DC4 Series aeroplanes registered in Australia, ensuring that they comply with specified safety standards. The regulation encompasses the entities and individuals responsible for maintaining the airworthiness of these aeroplanes, including operators, maintenance providers, and any other relevant parties within the aviation industry. The geographic scope of this regulation is national, as it applies across the Commonwealth of Australia, ensuring consistent safety standards and practices nationwide. While the regulation does not explicitly list exclusions or exemptions, it is designed to cover all Douglas DC4 Series aeroplanes within its jurisdiction, thereby extending its application through the detailed specifications provided in the referenced documents, such as Douglas SB (DC4) No. 15 and ANO 105.1.16.2.5.11, Issue 2.

Key Provisions

The main operative sections of the Civil Aviation Regulations 1998, specifically under PART 39 - 105, pertain to the Airworthiness Directives (AD) for the Douglas DC4 Series Aeroplanes. Section AD/DC4/12 is focused on the rework of the main undercarriage door. This section requires that the main undercarriage door of the specified aircraft model be reworked in accordance with the specifications provided in either Douglas SB (DC4) No. 15, dated 30 September 1946, or ANO 105.1.16.2.5.11, Issue 2. These documents outline the necessary procedures and standards that must be adhered to in order to ensure the airworthiness of the aircraft. The obligations and requirements imposed by this legislation are stringent and must be met by all parties involved in the maintenance and operation of Douglas DC4 Series Aeroplanes. Operators and maintenance providers must ensure that the rework of the main undercarriage door is carried out in strict compliance with the specified documents. This includes conducting a thorough inspection of the undercarriage door, followed by any necessary repairs, modifications, or replacements as outlined. Failure to comply with these directives could result in the aircraft being deemed unairworthy, which would prohibit its operation until the required rework is completed. Failure to adhere to the provisions of AD/DC4/12 may result in significant legal and financial consequences. In terms of civil liabilities, non-compliance could lead to the grounding of the aircraft, resulting in substantial financial losses for the operator due to delays and cancellations. Additionally, there could be hefty fines imposed by the Civil Aviation Safety Authority (CASA) for each instance of non-compliance. From a criminal perspective, individuals or companies found guilty of operating an aircraft that does not meet the required airworthiness standards could face criminal charges. These charges could result in substantial fines and, in severe cases, imprisonment for the responsible parties. It is imperative for all stakeholders to fully understand and comply with these regulations to avoid such serious repercussions.

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Sourced from the Federal Register of Legislation at 26 August 2026. For the latest information on Australian Government law please go to https://www.legislation.gov.au.