AD/DHE/9 - Engine Speed - Restriction

Overview

The Civil Aviation Regulations 1998, specifically Part 39, Section 106, includes Airworthiness Directives designed to enhance aviation safety within Australia. Enacted by the Parliament of the Commonwealth of Australia, these regulations aim to address safety issues by ensuring that all aircraft and their components meet stringent safety standards. The directive AD/DHE/9, which pertains to De Havilland Piston Engines, specifically targets Gipsy Queen 70, 70-2, and 70-3 engines that have not been modified according to Mod. G1704, as well as all Gipsy Queen 70 series engines fitted with single piece barrel propellers. This directive mandates compliance to prevent potential risks associated with engine speed restrictions, thereby protecting the safety of passengers and crew. The policy objective behind these regulations is to maintain the highest safety standards in civil aviation through timely and effective enforcement of airworthiness directives.

Scope and Application

The Civil Aviation Safety Authority (CASA) has established the Airworthiness Directives under the Civil Aviation Regulations 1998 to ensure the safety and airworthiness of aircraft and related components. Specifically, AD/DHE/9 pertains to the engine speed restriction for Gipsy Queen 70, 70-2 and 70-3 series piston engines, which are not modified to Mod. G1704, and all Gipsy Queen 70 series engines fitted with single piece barrel propellers. This directive applies to the specified engines installed in aircraft operating within Australia, thereby extending the jurisdictional reach of the regulation to all Commonwealth airspace. Compliance with the directive is mandatory and must be achieved immediately, as outlined in either DH Special Propeller Technical Instruction No. 23 or ANO 106.1.7.6.1, Issue 2. The directive applies to aircraft operators, owners, and maintenance providers who must adhere to the specified requirements to maintain the airworthiness of their aircraft. No exclusions or exemptions are stated within this specific directive, and its application may be further detailed or extended through subordinate instruments as necessary.

Key Provisions

The Civil Aviation Regulations 1998, specifically under Part 39 - 106, address the airworthiness directives for certain piston engines. Section AD/DHE/9 pertains to the engine speed restrictions for Gipsy Queen 70, 70-2, and 70-3 engines that have not been modified to Mod. G1704, as well as all Gipsy Queen 70 series engines fitted with single-piece barrel propellers (Section 1). Compliance with these directives is mandated immediately, with reference to either DH Special Propeller Technical Instruction No. 23 or ANO 106.1.7.6.1, Issue 2 (Section 2). Under this legislation, the primary obligation for aircraft operators and owners is to ensure that the specified Gipsy Queen engines meet the outlined restrictions on engine speed. This involves adhering to technical instructions or applicable airworthiness notices, which detail the necessary modifications or operational constraints (Section 1). Operators must ensure that their maintenance and operational protocols align with these directives to maintain compliance with airworthiness standards. Failure to comply with the airworthiness directives set forth in Section AD/DHE/9 may result in severe consequences. The Civil Aviation Safety Authority (CASA) has the authority to enforce these regulations, and non-compliance can lead to penalties, including potential legal action against the operators or owners of the non-compliant aircraft. The exact nature and severity of penalties are not specified within the provided text, but they may include fines, operational restrictions, or other regulatory actions deemed necessary by CASA (Section 3).