AD/DH 89/2 - Aileron Differential Pulley - Inspection

Overview

The Civil Aviation Regulations 1998, as amended through legislative instrument F2006B08914, introduce specific airworthiness directives aimed at ensuring the safety and reliability of aircraft operations. This legislation, enacted by the Australian Parliament, is designed to address the specific maintenance requirements of the DH 89 (Dragon Rapide) series aeroplanes, particularly focusing on the inspection of aileron differential pulleys. The primary objective of this directive is to ensure compliance with the applicable airworthiness standards by mandating a thorough inspection of the aileron differential pulleys to ascertain their correct location. This is crucial for maintaining the structural integrity and operational safety of the aircraft, thereby contributing to the overarching goal of enhancing aviation safety within the country. The regulatory framework established under these Civil Aviation Regulations serves to guide operators and maintainers in adhering to the prescribed safety measures. By stipulating that the inspection must be conducted forthwith, the legislation underscores the importance of timely compliance to prevent any potential safety hazards. This directive is a critical component in the broader strategy to maintain high safety standards in civil aviation, reflecting the policy objective of safeguarding the travelling public and aviation personnel.

Scope and Application

The Civil Aviation Regulations 1998, as outlined in Part 39 - 105 of the Civil Aviation Safety Authority Schedule of Airworthiness Directives, specifically addresses the inspection requirements for the aileron differential pulleys on DH 89 (Dragon Rapide) Series Aeroplanes. This regulation applies to all models of the DH 89 series, mandating that the aileron differential pulleys must be inspected for their correct location. Specifically, the port aileron differential pulley must be identified as P/N 46942A, while the starboard pulley must be identified as P/N 46943A, or as otherwise specified in ANO 105.1.14.10.6.1. Compliance with these directives must be achieved forthwith. This regulation is binding under Commonwealth legislation, thereby extending its jurisdictional reach across the entire nation, ensuring a uniform standard of aircraft safety and maintenance throughout Australia. While the regulation itself is explicit, its implementation and enforcement may be further detailed in subordinate instruments issued by the Civil Aviation Safety Authority.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, contains detailed provisions regarding the airworthiness directives for certain aircraft, including the DH 89 (Dragon Rapide) series aeroplanes. The section AD/DH 89/2 mandates that the aileron differential pulleys must be inspected for correct location on all models of these aeroplanes (sections 1-3). The requirement is straightforward: the pulleys must be situated as per the specifications provided by the parts numbers, with P/N 46942A for the port side and P/N 46943A for the starboard side, or as outlined in ANO 105.1.14.10.6.1. The directive stipulates that this inspection must be carried out immediately or "forthwith" as specified in the regulation (section 5). The obligations under these regulations are significant for aircraft operators and maintenance personnel. They must ensure that the aileron differential pulleys are correctly located as specified to maintain the airworthiness of the aircraft. This involves conducting a thorough inspection and verifying that the pulleys are in the correct positions to avoid any potential operational issues that might compromise safety (sections 4-5). Any deviation from the specified locations must be rectified without delay to adhere to the regulatory requirements. Failure to comply with these airworthiness directives can result in serious consequences. The regulations do not explicitly state the penalties for non-compliance in this particular section, but generally, the Civil Aviation Regulations 1998 provide for both civil and criminal penalties for breaches of safety regulations. These can include fines and, in severe cases, imprisonment. The exact penalties would depend on the nature and severity of the breach, as well as other applicable laws and regulations (section 6). Non-compliance can also lead to the grounding of the aircraft until the required inspections and corrections are made, thereby impacting the operational readiness and potentially the financial viability of the aircraft operator.