AD/DHE/6 - Connecting Rod Securing Nuts - Modification

Overview

The Civil Aviation Regulations 1998, which were enacted to regulate civil aviation within Australia and ensure safety, include specific directives related to airworthiness. One such directive is the AD/DHE/6, which addresses the modification of connecting rod securing nuts on Gipsy Queen Series 70 engines. This directive was introduced to address the risk of engine failure due to loose connecting rod securing nuts, ensuring that these engines meet the required safety standards before being installed in aircraft. The Civil Aviation Safety Authority, operating under the authority of the Commonwealth of Australia, established this directive to mitigate the risk of engine malfunctions and enhance aviation safety. The policy objective of this directive is to maintain the integrity of critical engine components and prevent potential in-flight failures, thereby protecting both the aircraft and its occupants.

Scope and Application

The Civil Aviation Regulations 1998, under PART 39 - 106 Civil Aviation Safety Authority, specifically within the Schedule of Airworthiness Directives, governs the airworthiness of certain aircraft components, including De Havilland piston engines. This particular regulation, AD/DHE/6, pertains to Gipsy Queen Series 70 engines and mandates modifications to the connecting rod securing nuts. The applicability extends to all Gipsy Queen Series 70 engines and requires compliance either through the specified modifications documented in DH Mods. G1432 Part 1 or G1708, or through compliance with ANO 106.1.7.6.5.9. The modifications must be completed before the engine is installed in an aircraft. The geographic and jurisdictional reach of this regulation is comprehensive, applying across the Commonwealth of Australia, ensuring that all aircraft utilising Gipsy Queen Series 70 engines meet the stipulated safety standards. The regulation does not explicitly state any exclusions, exemptions, or thresholds, suggesting a broad application to the specified engines. The regulation may be further extended or clarified through subordinate instruments, ensuring consistent enforcement and compliance across the aviation industry.

Key Provisions

The main operative sections of AD/DHE/6 pertain to the modification of connecting rod securing nuts for Gipsy Queen Series 70 engines, as detailed in sections 1 and 2. Section 1 of the directive references DH Mods. G1432 Part 1 or G1708, which outline the specific modifications to be made to the connecting rod securing nuts. Section 2 references ANO 106.1.7.6.5.9, which provides additional compliance guidelines. Compliance with these sections is mandatory before the installation of the engine in an aircraft, ensuring that all modifications are completed to the required standards. The Civil Aviation Regulations 1998, as modified by AD/DHE/6, impose several obligations on the parties or entities it governs. Firstly, it mandates that all modifications to the connecting rod securing nuts for Gipsy Queen Series 70 engines be carried out in accordance with the specified documentation, either DH Mods. G1432 Part 1 or G1708, or as outlined in ANO 106.1.7.6.5.9. This ensures that the modifications are performed correctly and safely. Secondly, it requires that these modifications be completed before the engine is installed in an aircraft, thereby ensuring that the engine meets all safety standards prior to operation. In terms of enforcement and consequences, the Civil Aviation Regulations 1998 impose penalties for non-compliance with AD/DHE/6. Any breach of the specified requirements could result in civil or criminal consequences. While the exact penalties are not detailed in the legislative instrument, non-compliance with civil aviation safety directives generally carries significant fines and potential imprisonment. The severity of the penalties underscores the importance of adhering to the specified modifications and compliance guidelines to ensure the safety and airworthiness of aircraft engines.