AD/CESSNA 180/49 - Self Locking Nuts

Overview

The Civil Aviation Regulations 1998, administered by the Civil Aviation Safety Authority, establish the legal framework governing civil aviation in Australia. Among its provisions, Part 39 focuses on airworthiness directives, with one such directive being AD/CESSNA 180/49, issued on 4 July 1978, pertaining to the Cessna 180, 182, and Wren 460 series aeroplanes. This directive addresses the issue of self-locking nuts on specific models and serial numbers, mandating actions in accordance with Cessna Service Letter SE77-44, Item 1, and requiring compliance within 100 hours of time in service after 30 April 1978. The policy objective behind this directive is to ensure the continued airworthiness and safety of the affected aircraft by addressing potential safety hazards associated with the self-locking nuts. This legislative instrument was enacted by the Commonwealth of Australia and is overseen by the Civil Aviation Safety Authority. Its primary purpose is to mitigate risks and ensure that aircraft meet the required safety standards, thereby protecting both the aviation industry and the public. The directive exemplifies the authority’s commitment to maintaining high safety standards in civil aviation, ensuring that specific models of aircraft are maintained to prevent any potential safety issues.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, mandate airworthiness directives for certain types of aircraft, ensuring safety and compliance with industry standards. This particular directive applies to specific Cessna 180, 182, and Wren 460 Series aeroplanes, identified by their serial numbers within the specified range. The directive necessitates compliance with Cessna Service Letter No. SE77-44, Item 1, which pertains to self-locking nuts, and requires the action to be taken within 100 hours of time in service following 30 April 1978. This regulation is binding on the operators of these aircraft and extends to any person or entity responsible for the maintenance and operation of the specified models within the Commonwealth of Australia. The directive does not explicitly exclude any parties, though certain conditions or exemptions may be stipulated in subordinate instruments or further clarifications by the Civil Aviation Safety Authority.

Key Provisions

The key provisions of the Civil Aviation Regulations 1998, specifically in Part 39 - 105 concerning the Cessna 180, 182, and Wren 460 series aeroplanes, are outlined in AD/CESSNA 180/49. This directive addresses the issue of self-locking nuts on these aircraft models. Section 1 of the directive specifies the applicability of the directive, which is limited to Model 180 aircraft with serial numbers ranging from 18052678 to 18052698 and Model 182 aircraft with serial numbers ranging from 18264686 to 18264736. Section 2 outlines the requirement, which mandates that the action must be taken in accordance with Cessna Service Letter No. SE77-44, Item 1. The obligations imposed on the parties governed by this directive include ensuring that the specified models of Cessna aircraft are inspected and maintained according to the directive's requirements. This involves adhering to the specified timeframes and ensuring that the action prescribed by Cessna Service Letter No. SE77-44, Item 1 is completed within 100 hours of time in service after 30 April 1978. Compliance with this directive is crucial to maintaining the airworthiness of the affected aircraft. Failure to comply with the requirements of this directive can result in civil or criminal consequences. Under the Civil Aviation Act 1988, non-compliance with airworthiness directives can lead to enforcement actions by the Civil Aviation Safety Authority (CASA). The penalties for non-compliance can include fines and potential criminal charges for individuals found to have wilfully or negligently contravened the regulations. The maximum penalties for such offences can be significant, reflecting the importance of adhering to these safety requirements. It is imperative for operators and maintenance personnel to ensure strict compliance to avoid these potential consequences.