AD/DHE/26 - Induction Manifold - Pressure Test

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of the Commonwealth of Australia, form the foundational legal framework governing aviation safety within Australia. Within this extensive set of regulations, Part 39 outlines specific airworthiness directives that are crucial for ensuring the safety and operational standards of aircraft. One such directive, AD/DHE/26, pertains to the induction manifold pressure test for De Havilland piston engines, specifically those of the Gipsy Major series. This directive was introduced to address safety concerns by mandating regular pressure tests to ensure the continued airworthiness of these engines, thereby enhancing the overall safety of civil aviation operations in Australia. The policy objective of these airworthiness directives is to maintain and improve the safety standards of civil aviation by ensuring that aircraft and their components comply with stringent regulatory requirements. The directive applies to engines manufactured by R. Royce with specific model numbers, requiring compliance within 100 hours of time in service following the directive's issuance and at regular intervals thereafter. This approach is designed to proactively identify and mitigate potential safety risks, thereby protecting both the aviation industry and the public.

Scope and Application

The Civil Aviation Safety Authority Schedule of Airworthiness Directives under the Civil Aviation Regulations 1998 applies specifically to Gipsy Major series engines, identified by the model numbers R. Royce Gipsy TNS G No. 77 or R. Royce Gipsy TNS GM 10 No. 47. This legislative instrument is part of the broader framework governing civil aviation safety in Australia, and it is administered by the Civil Aviation Safety Authority, a Commonwealth entity. The directive mandates compliance within 100 hours of time in service following 30 August 1974, and subsequently at intervals not exceeding 100 hours of time in service. This requirement ensures the ongoing airworthiness and safety of these piston engines by mandating specific pressure tests on the induction manifold. The scope of this Act is geographically and jurisdictionally aligned with the Commonwealth of Australia, meaning it applies nationally across all states and territories. There are no exclusions, exemptions, or thresholds specified within this particular directive, and the regulation is directly applicable without the need for subordinate instruments to extend or restrict its application.

Key Provisions

The main operative sections of the Civil Aviation Regulations 1998, Part 39, Schedule of Airworthiness Directives, specifically AD/DHE/26, focus on ensuring the safety of De Havilland Piston Engines, particularly the Gipsy Major series. This directive mandates a pressure test on the induction manifold of the specified engines (Section 1). To comply with this directive, the engine must have the induction manifold pressure tested, as indicated by document number 1: R. Royce Gipsy TNS G No. 77, or document number 2: R. Royce Gipsy TNS GM 10 No. 47. This compliance is required within 100 hours of time in service after 30 August 1974 and must be repeated at intervals not exceeding 100 hours time in service thereafter (Section 8/74). The obligations imposed by this Act on the parties or entities it governs are stringent and clear. Operators of Gipsy Major series engines must ensure that the pressure test is conducted by a certified technician or engineer, using the specified documents as a guide. This ensures that the engine meets the required safety standards and reduces the risk of in-flight failure. The requirement to adhere to a strict schedule for these tests ensures ongoing airworthiness and safety of the aircraft utilising these engines. Failure to comply with these provisions can result in serious consequences. The Act does not explicitly state the penalties for non-compliance within the text provided, but typically, breaches of airworthiness directives can lead to severe civil and criminal penalties. In the context of civil aviation, non-compliance can result in the grounding of aircraft, fines, and potential revocation of operating certificates. Criminally, individuals or companies found guilty of non-compliance may face imprisonment, fines, or both, depending on the severity of the breach and its impact on aviation safety. The importance of adhering to these directives cannot be overstated. Ensuring that the induction manifold pressure tests are performed as specified not only protects the safety of the aircraft and its occupants but also upholds the standards set by the Civil Aviation Safety Authority (CASA). The clear and specific nature of these provisions ensures that all parties involved understand their responsibilities and the potential consequences of failure to comply.