AD/DHC-6/17 Amdt 1 - Control Column - Lower Sub-Assembly - Inspection

Overview

The Civil Aviation Regulations 1998, as amended, were enacted to regulate and ensure safety in civil aviation within Australia. This legislation, overseen by the Australian Parliament, addresses the need for comprehensive and consistent regulation of civil aviation activities to protect the public and enhance safety standards. One of the key objectives of these regulations is to mandate specific safety directives, such as the Airworthiness Directive (AD) for the DHC-6 (Twin Otter) series aeroplanes, which ensures that aircraft meet the necessary safety standards to operate safely in Australian airspace. The policy objective behind these regulations is to maintain high safety standards and compliance with international civil aviation safety protocols.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, mandates the Civil Aviation Safety Authority (CASA) to issue Airworthiness Directives (ADs) that ensure the safety and airworthiness of aircraft operated within Australian airspace. The AD/DHC-6/17 Amendment 1 applies to all models of DHC-6 (Twin Otter) series aeroplanes, requiring a thorough inspection of the control column lower sub-assembly. This requirement ensures that the structural integrity of the control column is maintained, thereby enhancing flight safety. The scope of this directive encompasses any entity or individual operating a DHC-6 series aeroplane within the Commonwealth of Australia, ensuring a uniform approach to aircraft maintenance and safety. There are no specified exclusions, exemptions, or thresholds in the directive itself, but compliance is necessary for all operators of the specified aircraft type. Subordinate instruments may extend or further define the application of these regulations, providing additional details or specific operational guidelines. The geographic reach of this legislation is national, applying to all aircraft registered and operated within Australia. The directive is specific to the DHC-6 (Twin Otter) series aeroplanes, and it is enforceable under the authority of CASA. This ensures that the safety standards set forth in the regulations are consistently applied and monitored across the aviation industry within Australia.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, addresses the schedule of airworthiness directives for various aircraft, including the DHC-6 (Twin Otter) Series Aeroplanes. One key provision is AD/DHC-6/17 Amendment 1, which pertains to the inspection of the control column lower sub-assembly (Section 8/69). This directive is applicable to all models of the DHC-6 series and is based on De Havilland of Canada Service Bulletin No. 6/180 Rev. A. The directive requires that the control column lower sub-assembly be inspected in accordance with the detailed requirements outlined in the compliance document. These regulations impose specific obligations on aircraft operators and maintenance personnel to ensure that the inspection of the control column lower sub-assembly is performed correctly and in a timely manner. Operators must ensure that their maintenance teams are adequately trained and have access to the necessary documentation and tools to carry out the inspection. Furthermore, records of all inspections must be maintained and kept up to date to demonstrate compliance with the airworthiness directive. Failure to comply with the requirements set out in AD/DHC-6/17 Amendment 1 could result in serious safety implications, as the control column lower sub-assembly is a critical component of the aircraft's flight control system. Non-compliance with these regulations may lead to enforcement actions by the Civil Aviation Safety Authority (CASA). Potential consequences include fines, suspension or revocation of an aircraft's airworthiness certificate, and criminal charges against individuals responsible for the oversight of the maintenance activities. The maximum penalties for breaches of these regulations can be significant, reflecting the high importance of maintaining airworthiness in civil aviation.