Overview

The Civil Aviation Regulations 1998, enacted by the Australian Government, form a crucial part of the regulatory framework governing civil aviation safety within Australia. This legislation, overseen by the Civil Aviation Safety Authority (CASA), aims to ensure that all civil aviation operations are conducted in a manner that minimises risk to passengers, crew, and the public. One specific amendment to these regulations, AD/DHC-1/32 Amendment 2, addresses the critical issue of structural integrity in De Havilland DHC-1 (Chipmunk) Series Aeroplanes. This amendment mandates the inspection of the fuselage rear bulkhead, reinforcing plates, and forward angle fittings, areas identified as prone to cracking, to enhance the overall safety of these aircraft. The policy objective is to proactively identify and mitigate potential structural failures, thus maintaining high safety standards in civil aviation. The legislative instrument requires inspections to be conducted under specific conditions, such as before flights involving aerobatics or glider towing, and within 10 flight hours following a specified date. This requirement ensures that any potential issues are identified and addressed promptly, thereby preventing accidents and enhancing the safety of flight operations. The amendment references technical documents and directives from other national aviation authorities, such as Transport Canada and the UK Civil Aviation Authority, to align with international safety standards and practices.

Scope and Application

The Civil Aviation Regulations 1998, under PART 39 - 105, specifically addresses the Airworthiness Directives for the De Havilland DHC-1 (Chipmunk) Series Aeroplanes, with AD/DHC-1/32 Amendment 2 being a critical component of these regulations. This directive applies universally to all models of the De Havilland DHC-1 series aeroplanes, mandating a detailed inspection of the fuselage rear bulkhead, reinforcing plates, and forward angle fittings in the area of the tailplane fittings as per British Aerospace Technical Note TNS No 183, Issue 4, dated 15 May 1991. This directive aims to mitigate the risks associated with the cracking of these structural components, which have been identified in service. The inspection requirement is stringent, with specific timelines: inspections must occur before further flight for aerobatics or glider towing, and within 10 flight hours after 6 March 1992 for other flying purposes. Once the initial inspection is completed, further inspections should align with the specified intervals in British Aerospace TNS 183 Para 4 (7). This directive is an extension of the original issue dated 16 May 1990 and includes references to similar directives issued by Transport Canada and the UK Civil Aviation Authority to ensure international compliance and safety standards.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39, Section 105, mandates certain airworthiness directives for De Havilland DHC-1 (Chipmunk) series aeroplanes. The directive AD/DHC-1/32 Amendment 2 (section 39.105) pertains to the inspection of the fuselage rear bulkhead, reinforcing plates, and forward angle fittings in the area of the tailplane fittings. This inspection must be conducted in accordance with British Aerospace Technical Notice No 183, Issue 4, dated 15 May 1991. The amendment also references Transport Canada AD CF-91-38 and UK CAA AD 005-05-90 for additional context. The directive applies to all models of the De Havilland DHC-1 series aeroplanes. Operators and owners of De Havilland DHC-1 aeroplanes are required to ensure that the specified inspections are carried out. The inspection must occur before any flight involving aerobatics or glider towing and within 10 flight hours following 6 March 1992 for all other flying activities. Subsequent inspections must follow the schedule specified in British Aerospace TNS 183, Paragraph 4 (7). This requirement is crucial to maintain the airworthiness of the aircraft and ensure the safety of all operations involving these aeroplanes. Failure to comply with the airworthiness directive can lead to significant consequences. The Civil Aviation Safety Authority (CASA) has the authority to enforce penalties and sanctions against non-compliance. While the specific penalties are not detailed in the legislation excerpt, it is known that non-compliance with airworthiness directives can result in substantial fines, suspension of the aircraft's operating certificate, or other regulatory actions deemed necessary by CASA. These measures are in place to ensure that all aircraft meet the required safety standards and to prevent potential accidents or incidents arising from structural deficiencies.