Overview

The Civil Aviation Safety Regulations 1998 were enacted to ensure the safety of civil aviation within Australia, addressing the need for stringent regulations and oversight to maintain airworthiness and protect passengers, crew, and the public. This legislative instrument, issued by the Civil Aviation Safety Authority (CASA), aims to ensure that aircraft and aeronautical products meet the required safety standards. The Airworthiness Directive (AD) for the Learjet 60 Series Aeroplanes, specifically AD/LJ60/3, targets a critical safety issue identified with the brake valve system, which could potentially lead to catastrophic failure if not addressed. This directive mandates specific actions to be taken to rectify the unsafe condition, ensuring that the identified risk of loss of braking capability is mitigated. The policy objective is to enhance the safety of air travel by mandating necessary modifications to aircraft components to prevent potential safety hazards.

Scope and Application

The Civil Aviation Safety Regulations 1998, specifically Part 39 - 105, issued under the legislative instrument F2006B11171, pertains to the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives. This Airworthiness Directive applies to Learjet 60 Series aeroplanes with serial numbers ranging from 60-002 through 60-189 inclusive. The directive mandates that certain actions must be taken to rectify an unsafe condition identified in the brake valve system. The requirement involves replacing specific components, such as the brake valve lever stop switch and the brake valve adjustment screws, as per Bombardier Service Bulletin (S/B) 60-32-10, Revision 1. The compliance section stipulates that these actions must be carried out unless they have already been completed prior to further flight. The directive becomes effective on 15 April 2004, and its issuance is notified in the Commonwealth of Australia Gazette on 24 March 2004. The geographical reach of this legislation is nationwide, impacting all relevant aircraft within the Australian jurisdiction.

Key Provisions

The Airworthiness Directive (AD) issued under the Civil Aviation Safety Regulations 1998 (CASR 1998) specifically targets the Learjet 60 Series Aeroplanes, serial numbers ranging from 60-002 to 60-189 inclusive (Section 1). This directive mandates certain actions to be taken to address safety concerns related to the brake valve of these aircraft. For aeroplanes with serial numbers 60-002 to 60-093 and 60-095 to 60-188, the directive requires the replacement of the existing brake valve lever stop switch with a new one, along with replacing the brake valve adjustment screws with new improved screws, as outlined in Bombardier Service Bulletin (S/B) 60-32-10, Revision 1, dated June 22, 2000 (Section 2). For aeroplanes with serial numbers 60-094 and 60-189, only the replacement of the brake valve adjustment screws with new improved screws is required, as per the same service bulletin (Section 2). The AD imposes specific obligations on aircraft owners, operators, and maintenance providers to ensure compliance with the directive. They must replace the brake valve lever stop switch and the adjustment screws, as applicable, on the specified Learjet 60 Series aeroplanes. This action must be completed in accordance with the instructions provided in Bombardier S/B 60-32-10, Revision 1, and before further flight, if not already accomplished (Section 3). The directive became effective on 15 April 2004, as notified in the Commonwealth of Australia Gazette on 24 March 2004 (Section 4). Failure to comply with this AD may result in unsafe conditions that could lead to the loss of all hydraulic fluid and the consequent loss of normal braking, posing significant safety risks (Section 5). Under CASR 1998, failure to comply with an Airworthiness Directive can have serious legal and safety consequences. Specifically, non-compliance with this AD may lead to civil or criminal penalties, including fines and potential imprisonment, as determined by the relevant authorities. The exact penalties can vary depending on the severity of the non-compliance and the specific provisions of the CASR 1998. The directive aims to ensure that all affected aircraft are brought up to the required safety standards to prevent potential accidents and ensure the safety of all passengers and crew on board. In summary, the AD issued under the Civil Aviation Safety Regulations 1998 mandates specific actions to be taken on Learjet 60 Series Aeroplanes to address safety concerns related to the brake valve. Compliance with this directive is essential to prevent unsafe conditions and potential accidents. Failure to comply may result in civil or criminal penalties, underscoring the importance of adhering to the AD to ensure the safety of all individuals involved in aviation activities.