COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Gates Learjet 24 & 25 Series Aeroplanes
AD/LEARJET/8 Main Landing Gear Upper Strut - Inspection 3/75 Applicability: Model 24 with S/Nos. 24-100 to 24-297; and model 25 with S/Nos. 25-003 to 25-182. Requirement: To detect cracks or flaws in the MLG upper strut:-
- Remove strut from aeroplane, dismantle, clean and inspect using a Fluorescent Dye Penetrant Technique.
2. If cracks or flaws are disclosed by the inspection in para. 1 evaluate the position of cracks or flaws as per Fig. 1 of Gates Learjet SB No. 23/24/25-259; reject or rework affected upper struts as specified.
Compliance: Within 600 hours time in service after 30 April 1975 or 30 September 1976 whichever occurs first.
Overview
The Civil Aviation Regulations 1998, enacted by the Australian Parliament, establish a comprehensive framework for ensuring the safety and efficiency of civil aviation in Australia. Part 39, specifically, contains provisions for airworthiness directives aimed at maintaining the highest standards of aircraft safety. One such directive, AD/LEARJET/8, was introduced to address issues identified in the main landing gear upper struts of Gates Learjet 24 and 25 Series aeroplanes, specifically targeting aircraft with serial numbers within certain ranges. The policy objective behind this directive is to ensure the structural integrity of the landing gear through regular inspection and maintenance, thereby preventing potential in-flight failures and ensuring passenger safety. Compliance with this directive is mandatory and must be achieved within specific time frames post the dates outlined in the regulation.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105, addresses the Airworthiness Directives for Gates Learjet 24 and 25 Series Aeroplanes through AD/LEARJET/8. This directive applies to a specific subset of aircraft, namely Model 24 with serial numbers ranging from 24-100 to 24-297 and Model 25 with serial numbers from 25-003 to 25-182. The regulation mandates a rigorous inspection procedure to detect any cracks or flaws in the Main Landing Gear (MLG) upper strut of these aircraft. To comply with the directive, the strut must be removed, dismantled, cleaned, and inspected using a Fluorescent Dye Penetrant Technique. If any cracks or flaws are found during the inspection, their positions must be evaluated according to Figure 1 of Gates Learjet Service Bulletin No. 23/24/25-259, and the affected upper struts must be either rejected or reworked as specified. The compliance deadline for this directive is set at 600 hours of time in service after the earlier of 30 April 1975 or 30 September 1976. The regulations are administered by the Civil Aviation Safety Authority and apply nationally across Australia, ensuring that all applicable aircraft meet the stipulated airworthiness standards.
Key Provisions
The Civil Aviation Regulations 1998, under Part 39 - 105, mandate specific safety directives for certain models of Gates Learjet aeroplanes. Specifically, AD/LEARJET/8 targets the main landing gear (MLG) upper strut of the Gates Learjet 24 and 25 series, focusing on detecting cracks or flaws in these components. This directive applies to model 24 with serial numbers ranging from 24-100 to 24-297 and model 25 with serial numbers from 25-003 to 25-182. The primary requirement (Section 3/75) involves removing the MLG upper strut from the aeroplane, dismantling it, cleaning it, and inspecting it using a Fluorescent Dye Penetrant Technique to identify any cracks or flaws.
Entities governed by this legislation must adhere to strict compliance protocols to ensure the safety and airworthiness of the specified Gates Learjet aeroplanes. They are required to conduct the outlined inspection within 600 hours of the aeroplane's time in service after either 30 April 1975 or 30 September 1976, whichever date is later. If the inspection reveals cracks or flaws, the position of these defects must be evaluated according to the specifications provided in Figure 1 of Gates Learjet Service Bulletin No. 23/24/25-259. Based on this evaluation, the affected upper struts must either be rejected or reworked as specified in the relevant service bulletin.
Failure to comply with these safety directives can lead to severe consequences. The Civil Aviation Regulations 1998 impose significant penalties for non-compliance, which can include both civil and criminal liabilities. The specific penalties for breaches of these regulations can vary, but they are designed to enforce strict adherence to the outlined safety measures. Non-compliance may result in substantial fines, and in severe cases, criminal charges could be brought against the responsible parties or entities. The exact penalties are detailed in the overarching regulations and can include maximum financial penalties and potential imprisonment for those found guilty of serious breaches.