Overview

The Civil Aviation Regulations 1998, under Part 39 - 105, encompasses a series of Airworthiness Directives that ensure the safety and airworthiness of aircraft in Australian airspace. Specifically, AD/AT/9Amdt 2 pertains to the Airtractor AT-300, 400, and 500 Series Aeroplanes, addressing critical maintenance requirements to mitigate risks associated with the control column yoke bolt. This legislative instrument was enacted by the Civil Aviation Safety Authority (CASA) to rectify identified safety concerns, particularly the cracking and failure of control column yoke bolts, which could potentially lead to severe operational hazards. The policy objective is to enhance the safety standards of civil aviation by mandating regular inspections and necessary maintenance actions to prevent such failures. This directive became effective on 29 January 1998, following reports of major defects and the issuance of Service Letter #103, which highlighted the importance of these inspections and the availability of improved bolt specifications.

Scope and Application

The Civil Aviation Regulations 1998, specifically under Part 39 - 105, mandate the application of Airworthiness Directives concerning the Airtractor AT-300, 400, and 500 Series Aeroplanes. This legislative instrument targets all models of these aircraft and requires compliance with inspections of the control column yoke bolt to ensure it is free from excessive wear, deformation, or cracking. The directive applies to any person or entity operating these aircraft, ensuring that the inspection is performed under specified conditions, including when the aircraft has been subjected to abnormal loads or within certain timeframes if previously inspected. The regulation is applicable nationally, extending its reach across all states and territories within the Commonwealth of Australia, governed by the Civil Aviation Safety Authority. There are no stated exclusions or exemptions, and compliance is mandatory for all affected aircraft. This directive can be further detailed or modified through subordinate instruments, ensuring ongoing safety standards are met.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, details the Civil Aviation Safety Authority's (CASA) requirements for the maintenance and inspection of Airtractor AT-300, 400 and 500 Series Aeroplanes. Section AD/AT/9Amdt 2 pertains to the control column yoke bolt of these aircraft models, and it mandates the removal and inspection of the attachment bolt from the control column/aileron torque tube connection to check for excessive wear, deformation, or cracking (Section 39 - 105). The inspection is crucial, especially after the aircraft has been exposed to heavy wind gusts, jet or rotor blast, or any other abnormal loads while the gust locks were not engaged. Entities governed by these regulations must adhere to the inspection intervals specified in the directive. According to Section 39 - 105, inspections must be conducted whenever the aircraft experiences abnormal loads under specified conditions, or if the aircraft was inspected within the last 12 months, then within 12 months from that inspection. Furthermore, if the aircraft has not been inspected recently, an inspection must occur within 12 months and then at intervals not exceeding 12 months thereafter. This continuous cycle of inspection ensures that the control column yoke bolts remain in good condition and do not pose a safety risk. Failure to comply with these inspection requirements can lead to severe consequences. Under Section 39 - 105, non-compliance with Airworthiness Directives can result in penalties, as these directives are legally binding. The specific penalties and the consequences of non-compliance are not detailed in the provided text, but they can include fines, grounding of the aircraft, or other enforcement actions by CASA. The severity of the penalties can vary depending on the nature and extent of the non-compliance.