AD/DHE/19 - Crankshaft - Inspection and Modification

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, are integral to ensuring the safety and regulation of civil aviation within the country. This legislation encompasses various parts, including Part 39, which specifically addresses airworthiness directives to maintain the safety standards of aircraft and their components. One such directive, AD/DHE/19, pertains to De Havilland piston engines, specifically the Gipsy Queen 30 series engines modified to Mod. 2036 or Mod. 2162. The directive was introduced to address safety concerns related to crankshaft issues and aims to ensure these engines meet the required safety standards. The policy objective is to mandate inspections and modifications to prevent potential failures and ensure continued airworthiness. The directive requires inspections within 100 hours of time in service after 15 April 1966 and at intervals not exceeding 400 hours thereafter until modification 2925 is incorporated. Additionally, engines must be modified before being installed in an aircraft following the next overhaul completed after 15 April 1966. This regulation was documented by Bristol Siddeley TNS GQ 30 No. 70 dated 16 November 1965 and Gipsy Mod. No. 2925, providing clear guidance for compliance and ensuring that these engines meet the necessary safety criteria.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 106, pertains to the Civil Aviation Safety Authority's Schedule of Airworthiness Directives, with AD/DHE/19 focusing on De Havilland Piston Engines, namely Gipsy Queen 30 series engines modified to Mod. 2036 or Mod. 2162. This legislation applies to all aircraft operators and maintenance personnel who are responsible for ensuring the airworthiness of these particular engine models. The directive applies nationally across Australia as it is a Commonwealth regulation, thus extending its jurisdictional reach throughout the country. The regulation mandates that engines of the specified series undergo an inspection within 100 hours of service time after 15 April 1966, and subsequent inspections must occur at intervals not exceeding 400 hours of service time until modification to Mod. 2925 is implemented. Furthermore, engines must be modified prior to installation in an aircraft following the next overhaul completed after the same date. This regulation ensures that the specified engines meet the required safety standards set forth by the Civil Aviation Safety Authority.

Key Provisions

The Civil Aviation Regulations 1998, specifically under PART 39 - 106, detail the Civil Aviation Safety Authority's (CASA) schedule of airworthiness directives for various aircraft components. In this context, AD/DHE/19 pertains to De Havilland Piston Engines, particularly the Gipsy Queen 30 series engines that have been modified to Mod. 2036 or Mod. 2162. The directive mandates an inspection and possible modification of the crankshaft to ensure continued airworthiness of the engines (section 4/66). This legislative instrument imposes specific obligations on the owners and operators of aircraft equipped with the specified engines. The primary requirement is to conduct an inspection of the crankshaft within 100 hours of time in service after 15 April 1966 and subsequently at intervals not exceeding 400 hours of time in service until a specific modification, Mod. 2925, is incorporated. Additionally, the engines must be modified before installation in an aircraft following the next overhaul completed after 15 April 1966. These requirements are outlined in the Bristol Siddeley TNS GQ 30 No. 70 dated 16 November 1965 and Gipsy Mod. No. 2925 documents. Failure to comply with the provisions of AD/DHE/19 could lead to significant legal consequences. While the specific penalties are not detailed in the text, non-compliance with CASA's airworthiness directives typically results in civil penalties under the Civil Aviation Act 1988, which can include substantial fines. Additionally, there may be criminal penalties applicable under the Act, particularly if non-compliance results in a safety breach or an incident. Such breaches could also lead to the grounding of the aircraft, thereby impacting operational capabilities and potentially causing financial loss to the operators. In summary, the key provisions of AD/DHE/19 require regular inspections and modifications of specified De Havilland Piston Engines to maintain their airworthiness. Non-compliance with these directives can result in both civil and potentially criminal penalties, emphasizing the importance of adhering to CASA's regulations to ensure the safety and legality of aviation operations.