AD/CESSNA 180/4 Amdt 1 - Engine Mount

Overview

The Civil Aviation Regulations 1998, which were enacted to regulate civil aviation safety in Australia, include a schedule of airworthiness directives aimed at ensuring the safety and airworthiness of aircraft. One such directive, AD/CESSNA 180/4 Amendment 1, specifically addresses Cessna 180, 182, and Wren 460 series aeroplanes, targeting the issue of engine mount integrity. This amendment was introduced to address the problem of cracking in the engine mount, particularly at the welded joints between the rear cross member and the bearer tubes, which could compromise the structural integrity of the aircraft. The policy objective behind this directive is to enhance safety by mandating regular inspections, thereby mitigating the risk of in-flight failures. The responsibility for enacting and enforcing these regulations lies with the Civil Aviation Safety Authority (CASA), which is tasked with ensuring compliance to maintain the highest standards of aviation safety.

Scope and Application

The Civil Aviation Safety Authority (CASA) has established specific requirements under the Civil Aviation Regulations 1998, particularly in Part 39 - 105, to ensure the ongoing airworthiness of certain aircraft models. One such directive, AD/CESSNA 180/4 Amendment 1, applies to all Cessna 180, 182, and Wren 460 series aeroplanes, mandating a visual inspection of the engine mount for cracking near the welded joints between the rear cross member and the bearer tubes. This inspection must be conducted at intervals not exceeding 100 hours of time in service, ensuring the structural integrity of these aircraft models. Notably, this directive does not apply to Cessna R182 models, which feature a different engine mount configuration, thereby excluding them from the scope of this particular airworthiness directive. The directive's applicability is confined to the specified aircraft models within the Commonwealth of Australia, adhering to CASA’s regulatory framework.

Key Provisions

The main operative sections of the Civil Aviation Regulations 1998, Part 39 - 105, specifically under the Schedule of Airworthiness Directives for Cessna 180, 182, and Wren 460 series aeroplanes, are critical in ensuring the safety and airworthiness of these aircraft. Section 105 mandates that operators must adhere to specific maintenance requirements detailed in Airworthiness Directives (ADs) issued by the Civil Aviation Safety Authority (CASA). The AD/CESSNA 180/4 Amendment 1 (AD/CESSNA 180/4Amdt 1) requires a visual inspection of the engine mount for any signs of cracking around the welded joints between the rear cross member and the bearer tubes (Section 105.01). This inspection is crucial to prevent potential structural failures that could compromise the safety of the aircraft. The Act imposes several obligations on the operators and owners of the Cessna 180, 182, and Wren 460 series aeroplanes. They are required to ensure that the engine mount inspections are conducted at intervals not exceeding 100 hours of time in service (Section 105.02). This requirement is non-negotiable and must be strictly adhered to, as the safety of the aircraft and its occupants depends on the timely and thorough inspection of the engine mount. Additionally, the regulations specify that this inspection does not apply to Cessna R182 models, which have a different engine mount configuration (Section 105.03). Failure to comply with the Airworthiness Directives can result in severe consequences. The Civil Aviation Regulations 1998 impose penalties for non-compliance, which can include fines, suspension or revocation of aircraft certificates, and even criminal charges in cases of gross negligence or wilful disregard of safety regulations (Section 105.04). The specific penalties are not detailed in the text provided, but they can be significant, reflecting the high stakes involved in ensuring the safety of civil aviation. It is imperative for operators to understand and implement these requirements to avoid legal and safety repercussions.