AD/DH 89/1 - Fuel System Control - Modification

Overview

The Civil Aviation Regulations 1998, enacted by the Australian Parliament, constitute a comprehensive framework designed to ensure the safety of civil aviation within the country. One specific aspect of this legislation is found in Part 39, which details Airworthiness Directives for various aircraft types. This particular legislative instrument, F2006B08913, pertains to the DH 89 (Dragon Rapide) series aeroplanes and was introduced to address issues related to the fuel system control. The problem it was designed to solve involves ensuring that the fuel control cable housing is securely retained and clamped, as well as providing a reliable means for locking the pilot’s control lever to facilitate rapid shutdown in emergencies. The policy objective underlying this directive is to enhance the safety and reliability of the aircraft by minimising risks associated with fuel system failures.

Scope and Application

The Civil Aviation Regulations 1998, specifically under Part 39, mandate the application of Airworthiness Directives (AD) for ensuring the safety of aircraft operations within Australia. AD/DH 89/1 pertains to the DH 89 (Dragon Rapide) series aeroplanes, imposing mandatory modifications to the fuel system controls on all models to mitigate risks associated with fuel control failures. The directive applies to any aircraft within Australia's jurisdiction, whether operated by private or commercial entities. Compliance with these regulations is immediate, necessitating the incorporation of a positive method for retaining and clamping the fuel control cable housing at both ends and at the bend where it enters the wing, along with a means of locking the pilot’s control lever in the “ON” position to enable rapid movement to the “OFF” position in an emergency. These regulations do not specify exclusions or exemptions, thus all operators of DH 89 (Dragon Rapide) series aeroplanes must adhere to these standards to maintain airworthiness. The scope of the AD is further defined and potentially extended through subordinate instruments such as notices and advisory circulars issued by the Civil Aviation Safety Authority.

Key Provisions

The Civil Aviation Regulations 1998, under Part 39, Section 105, includes a specific Airworthiness Directive (AD) concerning the DH 89 (Dragon Rapide) Series Aeroplanes. The AD/DH 89/1 focuses on modifications to the fuel system controls. According to section (1), the directive applies to all models of the DH 89 series. The primary requirement outlined in this directive is the modification of the fuel system controls to enhance safety. Specifically, section (1) mandates that a positive method of retaining and clamping the fuel control cable housing must be incorporated at both ends and at the bend where it enters the wing. Additionally, section (2) requires the incorporation of a means of locking the pilot’s control lever in the "ON" position, ensuring that it can be rapidly moved to the "OFF" position in the event of an emergency. Compliance with these modifications is mandatory and must be completed forthwith. This obligation is explicitly stated in the regulation to ensure that the safety enhancements are implemented without delay. The regulations stipulate that compliance must be achieved immediately, without any further notice or period for compliance beyond the issuance of the directive. Failure to comply with these directives can result in significant legal and safety ramifications, as the directive is underpinned by Part 100, Appendix “A” Notice No. 10/2 and ANO 105.1.14.0.1.1, which enforce stringent compliance measures. The breach of these directives can lead to serious consequences. Under the Civil Aviation Regulations 1998, non-compliance with Airworthiness Directives can result in enforcement actions, which may include fines, penalties, or other legal actions. The specific penalties for non-compliance are not detailed within the text of the directive but are governed by the overarching civil aviation regulatory framework, which can impose significant financial penalties and other legal sanctions for failure to adhere to airworthiness standards. Such breaches not only risk financial repercussions but also pose significant safety hazards, potentially endangering lives and property. Therefore, it is imperative that all stakeholders adhere strictly to the requirements set forth in the AD/DH 89/1 to ensure compliance with the safety standards mandated by the Civil Aviation Regulations.