AD/DH 104/4 - Aileron Differential Pulley Stud - Modification

Overview

The Civil Aviation Regulations 1998, specifically PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES, includes AD/DH 104/4 which pertains to the aileron differential pulley stud modification for De Havilland Dove series aeroplanes. This regulation was enacted to ensure that all Dove series aeroplanes meet specific safety standards by modifying the aileron differential pulley stud, a critical component affecting flight control. The regulation applies to all models of Dove series aeroplanes, mandating compliance before 1 September 1971 to ensure continued airworthiness and safety within the Australian civil aviation sector. Enacted by the Commonwealth of Australia, the policy objective is to maintain and enhance the safety standards of civil aviation, ensuring that aircraft meet stringent regulatory requirements to protect passengers and crew. This legislative instrument aims to address potential safety risks associated with the aileron differential pulley stud in Dove series aeroplanes, ensuring that any identified deficiencies are rectified to prevent accidents or incidents. By setting forth clear compliance deadlines and specific modifications, the regulation reinforces the commitment of the Civil Aviation Safety Authority to uphold the highest standards of aviation safety, reflecting a broader policy objective to safeguard the public and maintain the integrity of the nation's civil aviation infrastructure.

Scope and Application

The Civil Aviation Safety Authority Schedule of Airworthiness Directives, specifically AD/DH 104/4 pertaining to the De Havilland DH 104 (Dove) Series Aeroplanes, applies to all models of these aircraft. This directive mandates a modification to the aileron differential pulley stud, ensuring compliance before the specified date of 1 September 1971. The regulation is part of the broader Civil Aviation Regulations 1998, which govern civil aviation operations within the Commonwealth of Australia. The Act applies to any individual or entity operating these aircraft, ensuring adherence to the outlined safety directives to maintain airworthiness standards. The directive's jurisdictional reach is national, enforced by the Civil Aviation Safety Authority, which has the authority to mandate compliance and inspect adherence to the specified safety modifications across all operators of the Dove Series Aeroplanes in Australia. There are no stated exclusions or exemptions in this particular directive, meaning all qualifying aircraft must comply with the specified modification. Subordinate instruments may further detail implementation procedures and enforcement mechanisms.

Key Provisions

The Civil Aviation Regulations 1998, under Part 39, particularly AD/DH 104/4, pertains to the airworthiness directives for the de Havilland DH 104 (Dove) series aeroplanes. Specifically, this directive mandates the modification of the aileron differential pulley stud. The modification is required for all models of the Dove series, as evidenced by the document reference to De Havilland Mod. No. Dove. 765 or ANO 105.1.14.13.5.7, and compliance must be achieved before 1 September 1971. The primary operative sections of this legislation require all operators of the Dove series aeroplanes to ensure that the aileron differential pulley stud is modified according to the specified standards. This modification is essential to maintain the airworthiness of the aircraft, ensuring safety standards are met and operational risks are minimised. Compliance with these directives is mandatory, and failure to adhere to the specified timeline and modifications will result in the aircraft being non-compliant with safety regulations. Operators of Dove series aeroplanes must ensure that the aileron differential pulley stud is modified by the compliance date of 1 September 1971. This requirement encompasses all models of the Dove series, and operators must document compliance with the directive as specified in De Havilland Mod. No. Dove. 765 or ANO 105.1.14.13.5.7. The Civil Aviation Safety Authority (CASA) will likely conduct inspections to verify that these modifications have been completed as required. Failure to comply with the airworthiness directives outlined in AD/DH 104/4 can result in severe consequences. Civil penalties may be imposed for non-compliance, and the aircraft may be grounded if it is found to be non-compliant. Additionally, operators could face criminal charges if the non-compliance is deemed to have caused or contributed to an aviation incident or accident. The maximum penalties for such offences are not explicitly stated in the provided text, but they can include substantial fines and potential imprisonment, depending on the severity and impact of the non-compliance.