Overview

The Civil Aviation Regulations 1998, as amended, are a comprehensive set of rules governing all aspects of aviation in Australia, including the operation of aircraft, the qualifications of personnel, and the maintenance and airworthiness of aircraft. One such regulation, introduced under the authority of the Civil Aviation Act 1988, is the Airworthiness Directive (AD) pertaining to the Mooney M20 Series Aeroplanes, specifically AD/M20/37. This directive was introduced to address the issue of potential tolerance build-up in the lower empennage hinge assembly of certain Mooney M20K aeroplanes, which could result in the inability to achieve full nose-up trim. The directive applies to all Mooney M20K aeroplanes with specific serial numbers, mandating inspections and modifications to ensure continued airworthiness and safety. The policy objective behind this directive is to maintain the highest safety standards within Australian civil aviation, ensuring that all aircraft are maintained in a condition that allows for safe operation.

Scope and Application

The Civil Aviation Regulations 1998, specifically PART 39 - 105, pertains to the safety directives issued by the Civil Aviation Safety Authority (CASA) and applies to the Mooney M20 Series Aeroplanes. The particular directive AD/M20/37 focuses on the lower empennage hinge assembly and mandates both an inspection and modification for specific model M20K aircraft with serial numbers ranging from 25-0001 to 25-0086 and 25-0091 to 25-0094. This requirement is designed to address potential issues with the 480009 hinge assembly, which may hinder the aeroplane from achieving full 7-degree nose-up trim due to tolerance build-up during manufacturing. Compliance with these directives is mandatory within 100 hours of time in service after 31 July 1979, as referenced in Mooney Service Bulletin No. M20-216. This regulation operates within the Commonwealth of Australia, overseen by CASA, and ensures that the specified aircraft meet the necessary safety standards to operate within Australian airspace.

Key Provisions

The Civil Aviation Regulations 1998, specifically under Part 39 - 105, mandate the compliance with Airworthiness Directives (AD) for certain aircraft models. Section AD/M20/37 pertains to Mooney M20 Series aeroplanes and focuses on the inspection and modification of the lower empennage hinge assembly. This directive applies to all model M20K aeroplanes with serial numbers (S/Nos.) ranging from 25-0001 to 25-0086 and 25-0091 to 25-0094 (Section 3). The directive requires compliance with the specifications outlined in Mooney Service Bulletin No. M20-216, and mandates that the inspection and any necessary modifications must be completed within 100 hours of time in service after 31 July 1979 (Section 4). Operators and owners of affected Mooney M20K aeroplanes must ensure that the lower empennage hinge assembly is inspected and modified as specified in the Mooney Service Bulletin No. M20-216. This involves detailed examination to identify any tolerance build-up in the 480009 hinge assembly that could prevent the aeroplane from achieving the full 7° nose-up trim. If any issues are found, the assembly must be modified accordingly to rectify the problem (Section 5). This requirement ensures that the affected aircraft maintain the necessary safety standards and operational capabilities as intended by the manufacturer. Failure to comply with AD/M20/37 may result in serious safety implications and legal consequences. The Civil Aviation Safety Authority (CASA) may impose penalties on operators or owners who do not adhere to the specified requirements. The potential penalties can include fines or other enforcement actions. While the specific maximum penalties are not detailed in the provided text, it is important to note that non-compliance with ADs is taken very seriously and can result in significant civil or criminal repercussions depending on the severity of the breach (Section 6). Additionally, the safety and airworthiness of the affected aircraft are paramount. If the lower empennage hinge assembly is not inspected and modified as required, it could lead to operational failures or compromise the structural integrity of the aeroplane. Such failures could result in accidents or incidents, posing a risk to the occupants and potentially leading to severe legal consequences for those responsible for the aircraft’s maintenance (Section 7). Therefore, it is crucial for operators and owners to strictly adhere to the provisions of AD/M20/37 to ensure compliance and safety.