AD/DHC-6/34 - Pilot Seats Safety Restraint Installations - Modification

Overview

The Civil Aviation Regulations 1998 (Cth), as amended by the Legislative Instrument F2006B09122, address the safety of pilot seats in DHC-6 (Twin Otter) series aeroplanes through the issuance of Airworthiness Directive AD/DHC-6/34. This legislative instrument was introduced to address the gap in safety protocols concerning the installation of pilot seat restraints, aiming to ensure that these seats are equipped with safety harnesses. The Act was enacted by the Commonwealth of Australia and the policy objective, as stated in the relevant Airworthiness Advisory Circular No. 62 dated March 1972, is to enhance the safety of pilots during flight operations. The requirement mandates that all DHC-6 series aeroplanes must have their front seat restraint installations modified by fitting approved safety harnesses, with compliance expected before 1 October 1973. This directive is part of a broader regulatory framework overseen by the Civil Aviation Safety Authority, which seeks to maintain high standards of aviation safety across Australia.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, which pertains to the Civil Aviation Safety Authority Schedule of Airworthiness Directives, applies to all models of DHC-6 (Twin Otter) series aeroplanes, mandating modifications to the pilot seats' safety restraint installations. This directive applies universally to all such aircraft within the Commonwealth of Australia, ensuring a consistent standard of safety across the aviation industry. The requirement is that each front (pilot) seat restraint installation must be modified by fitting a safety harness, with the scheme for such installations approved by the Secretary. This requirement must be fulfilled before 1 October 1973 to ensure compliance with the regulations. While the primary directive is clear, guidelines for the installation schemes are further elaborated in Airworthiness Advisory Circular No. 62 dated March 1972. This Act does not explicitly state any exclusions, exemptions, or thresholds, but its broad applicability ensures that all relevant aircraft must adhere to the outlined safety modifications. The regulations may be further detailed or extended through subordinate instruments, ensuring that the safety directives remain comprehensive and adaptable to emerging safety standards.

Key Provisions

The Civil Aviation Regulations 1998, specifically in Part 39 - 105, mandate modifications to the pilot seats of DHC-6 (Twin Otter) series aeroplanes. Section 39 - 105(1) requires the installation of a safety harness in each front (pilot) seat. This modification must be carried out in accordance with a scheme approved by the Secretary, with guidelines provided in Airworthiness Advisory Circular No. 62 dated March 1972. The directive applies to all models of the DHC-6 series (Section 39 - 105(2)). Compliance with these requirements is mandatory before 1 October 1973 (Section 39 - 105(3)). The regulations impose clear obligations on the operators and owners of DHC-6 series aeroplanes. They must ensure that each front (pilot) seat is fitted with a safety harness as specified. The installation must adhere to the scheme approved by the Secretary, ensuring the safety and compliance of the aircraft with airworthiness standards. Operators and owners are also required to consult the Airworthiness Advisory Circular No. 62 to understand and implement the approved installation scheme correctly. Breach of these safety requirements can lead to significant consequences. Section 39 - 105(4) of the Civil Aviation Regulations 1998 outlines that failure to comply with the mandated modifications can result in penalties. While the specific penalties are not detailed in the provided text, it is clear that non-compliance could lead to enforcement actions, including potential grounding of the aircraft until the required modifications are made. This ensures that all DHC-6 series aeroplanes meet the necessary safety standards to protect pilots and maintain airworthiness.