AD/SD3-30/21 - Rudder Lower Bearing

Overview

The Civil Aviation Regulations 1998, as amended, constitute a crucial piece of Australian legislation aimed at ensuring the safety and efficacy of civil aviation within the country. Specifically, Part 39 - 105 of these regulations addresses the scheduling of airworthiness directives, ensuring that aircraft maintain high safety standards. One such directive, AD/SD3-30/21 concerning the rudder lower bearing, was introduced to address the risk of ice formation due to water ingress, a critical safety concern. This directive applies to all models and requires action in accordance with Shorts SB SD3-55-05 R2 Part A, with compliance needed at the next scheduled inspection and then at intervals not exceeding 600 hours of time in service or six months, whichever comes first. The objective of this regulation, enacted by the Australian Government, is to enhance aircraft safety and reliability through stringent airworthiness standards. The Civil Aviation Regulations 1998 were enacted by the Parliament of Australia, overseen by the Civil Aviation Safety Authority (CASA), with the overarching policy objective of maintaining and improving the safety of civil aviation. This particular legislative instrument, part of a broader series of airworthiness directives, specifically targets the issue of ice formation in rudder lower bearings, a problem that could potentially compromise flight safety. By mandating regular inspections and compliance with specified service bulletins, the legislation aims to mitigate risks associated with water ingress, ensuring that aircraft remain airworthy and compliant with safety standards.

Scope and Application

The Civil Aviation Regulations 1998, as amended, under the Commonwealth of Australia, specifically address the airworthiness of aircraft through various directives, including the Short SD3-30 Series Aeroplanes AD/SD3-30/21 concerning the rudder lower bearing. This legislative instrument applies to all models of Short SD3-30 Series Aeroplanes, mandating compliance with Shorts SB SD3-55-05 R2 Part A to mitigate potential ice formation due to water ingress in the rudder lower bearing. Compliance with this directive is required at the next scheduled inspection following the Maintenance Release issue dated after 7 May 1987, and subsequently at intervals not exceeding 600 hours of time in service or six months, whichever comes first. This regulation ensures the safety and operational integrity of the aircraft in question by setting clear maintenance and inspection standards. The legislation's scope is limited to the specified aircraft model and its maintenance requirements, and there are no exclusions or exemptions stated within the directive itself, although further application and enforcement details may be provided in subordinate instruments.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, includes the Civil Aviation Safety Authority's Schedule of Airworthiness Directives (AD/SD3-30/21), which applies to all models of the Short SD3-30 series aeroplanes. The key requirement under this directive pertains to the rudder lower bearing, as outlined in section 5/87. The directive mandates that action must be taken in accordance with the Shorts SB SD3-55-05 R2 Part A. This action is intended to reduce the possibility of ice formation due to water ingress in the rudder lower bearing. Compliance with this directive is mandatory for all operators of Short SD3-30 series aeroplanes. Specifically, the directive requires compliance at the next scheduled inspection for a Maintenance Release issue after 7 May 1987. Thereafter, the required action must be taken at intervals not exceeding 600 hours of time in service or six months, whichever comes first. This ensures that the rudder lower bearing is regularly inspected and maintained to prevent ice formation and associated safety risks. The obligations imposed by this directive are significant for operators of Short SD3-30 series aeroplanes. Operators must ensure that the specified maintenance actions are performed as required, which includes following the guidance in Shorts SB SD3-55-05 R2 Part A. This means that operators need to have adequate procedures in place to identify and mitigate the risk of water ingress and subsequent ice formation in the rudder lower bearing. Failure to comply with this directive could result in serious safety risks, as ice formation in the rudder lower bearing could compromise the aircraft's controllability and stability. Failure to comply with the requirements set out in AD/SD3-30/21 can result in severe consequences. While specific penalties are not detailed in the provided text, non-compliance with Civil Aviation Regulations is generally taken very seriously. The Civil Aviation Safety Authority has the authority to take enforcement action against operators who fail to adhere to Airworthiness Directives. This could include fines, enforcement notices, or even suspension of the aircraft's Airworthiness Certificate, which would prevent the aircraft from operating until the non-compliance issues are rectified. The potential for criminal charges and penalties could also arise if non-compliance is found to have contributed to an aviation accident or incident.