AD/CESSNA 170/12 Amdt 2 - Nose Gear Upper Torque Link

Overview

The Civil Aviation Regulations 1998, specifically under Part 39 - 105 and the Schedule of Airworthiness Directives, addresses the safety concerns related to the maintenance and inspection of certain aircraft components, such as the nose gear upper torque links in Cessna 170, 172, F172, FR172 and 175 series aeroplanes. This legislation was enacted to ensure the safety and airworthiness of aircraft by setting forth detailed maintenance and inspection requirements. The Australian Parliament established these regulations to provide a comprehensive framework for the oversight of civil aviation safety. The policy objective is to mandate regular inspections and maintenance of critical aircraft components to prevent mechanical failures and ensure the safety of all persons on board. Airworthiness Directive AD/CESSNA 170/12 Amendment 2 further specifies the need to inspect the nose gear upper torque link for cracks in the stop block and flanges of the "I" section. This involves removing paint from the inspection area and using either the dye penetrant method or a 10X magnifying lens for thorough examination. Additionally, protective finish must be restored post-inspection. Compliance with these inspection intervals, not to exceed 300 hours of service after 1 September 1971, is crucial to maintaining the integrity and safety of the aircraft.

Scope and Application

The Civil Aviation Regulations 1998, specifically under Part 39 and the Airworthiness Directives for Cessna 170, 172, F172, FR172, and 175 series aeroplanes, applies to all aircraft of these series that are fitted with nose gear upper torque links numbered 2014 K.A.E., with or without a prefix or suffix. This legislation is enforced by the Civil Aviation Safety Authority and operates within the Commonwealth of Australia, ensuring compliance across the national jurisdiction. The directive requires regular inspection of the nose gear upper torque link for cracks, particularly in the area of the stop block and the flanges of the “I” section of the link, to ensure the continued safety and airworthiness of these aircraft. The inspections must be conducted at intervals not exceeding 300 hours of time in service after 1 September 1971, with all paint removed and a suitable solvent used before inspecting by the dye penetrant method or with the aid of a 10X magnifying lens. Once the inspection is completed, the protective finish must be restored. This regulation extends its application through subordinate instruments, which may provide further detail or clarification on the inspection methods and compliance protocols. The directive ensures that specific maintenance checks are undertaken to uphold the safety standards of these aircraft within the Australian aviation industry.

Key Provisions

The Civil Aviation Regulations 1998, particularly under PART 39 - 105, mandate specific maintenance procedures for certain Cessna aircraft series. Section AD/CESSNA 170/12 Amendment 2 focuses on the nose gear upper torque link for the 172, F172, FR172, and 175 series aeroplanes, specifically those fitted with nose gear upper torque links numbered 2014 K.A.E., with or without a prefix or suffix. The primary requirement, as outlined, is a thorough inspection of the nose gear upper torque link for any signs of cracks in the area of the stop block and the flanges of the "I" section of the link (Section 1). The inspection procedure demands that all paint be removed using a suitable solvent from the area to be examined. The inspection itself must be conducted either by using the dye penetrant method or with the aid of a 10X magnifying lens to ensure any minute flaws are detected (Section 2). Once the inspection is complete, the protective finish must be restored to maintain the integrity and functionality of the link (Section 3). The obligation imposed on the aircraft owners, operators, and maintenance personnel is to adhere strictly to the outlined inspection and maintenance schedule. This includes performing the inspection at intervals not exceeding 300 hours of time in service following 1 September 1971, ensuring that any potential issues are identified and rectified promptly (Section Compliance). Failure to comply with these regulations could result in significant safety risks, potentially leading to serious accidents or incidents due to structural failure of the nose gear. Regarding the consequences of non-compliance, while the specific penalties are not detailed in the text, it is known that breaches of Civil Aviation Regulations can result in substantial fines and potential legal action. The severity of penalties can vary based on the nature and extent of the violation, but they may include administrative penalties, revocation of aircraft operating certificates, and even criminal charges in cases of gross negligence or willful disregard of safety regulations. These consequences underscore the importance of adhering to the stipulated maintenance and inspection requirements.