Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, provide a comprehensive framework for ensuring the safety and regulation of civil aviation within the country. One of the specific provisions of this Act is the Airworthiness Directives (ADs) issued by the Civil Aviation Safety Authority (CASA). AD/B747/23 is an example of such an AD, aimed at addressing a particular safety concern related to Boeing 747 series aeroplanes equipped with CF6, JT9D-3, or JT9D-7 engines. The directive was introduced to rectify an issue where transverse cracks were detected in the clevis root of the outboard engine strut diagonal brace forward, a problem traced to the local thickness of the component being less than the specified requirements. This defect was identified through reports from an overseas operator, and the AD seeks to ensure compliance with the specified inspection and modification protocols as outlined in the FAA AD 80-08-02, Amendment 39-3738, or Boeing Service Bulletin No. 747-54-2070. The overarching policy objective of these regulations is to maintain and enhance the safety standards of civil aviation in Australia.

Scope and Application

The Civil Aviation Regulations 1998, specifically PART 39 - 105 Civil Aviation Safety Authority Schedule of Airworthiness Directives, applies to all Boeing 747 aircraft equipped with either CF6, JT9D-3 or JT9D-7 engines. This regulation mandates a thorough inspection and necessary modification of the outboard engine strut diagonal brace forward clevis root to address the issue of transverse cracks that have been detected in the clevis root. The directive stems from an incident where an overseas operator reported the defect, which is attributed to the local thickness of the brace being less than the specified requirement. This regulation is intended to ensure the continued airworthiness and safety of Boeing 747 aircraft by addressing the structural integrity of the specified components. The scope of this directive is nationwide, ensuring compliance across all operators within the Commonwealth of Australia. The regulation references compliance with FAA AD 80-08-02, Amendment 39-3738, or Boeing Service Bulletin No. 747-54-2070, and specifies the compliance requirement as per document No. 1.7/80.

Key Provisions

The Civil Aviation Regulations 1998, particularly Part 39 - 105 concerning the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, includes specific provisions for maintaining the airworthiness of Boeing 747 series aeroplanes (s. 39.105). In this case, the regulation pertains to the outboard engine strut diagonal brace forward clevis root and mandates inspection and modification (AD/B747/23). The directive applies to all model 747 aircraft equipped with CF6, JT9D-3, or JT9D-7 engines. Compliance must be achieved as per the requirements outlined in FAA AD 80-08-02, Amendment 39-3738, or Boeing Service Bulletin No. 747-54-2070 (s. 39.105(1)). These regulations impose several obligations on the parties involved. Operators must ensure that all inspections and any necessary modifications are performed on the outboard engine strut diagonal brace forward clevis root as specified in the referenced documents. This includes thorough visual and, if necessary, non-destructive testing to identify any transverse cracks in the clevis root. If any defects are found, the operator must follow the prescribed procedures for repair or replacement as detailed in the FAA AD or Boeing SB to maintain airworthiness (s. 39.105(2)). Operators must also keep detailed records of all inspections and modifications performed, as well as the dates these actions were taken (s. 39.105(3)). Failure to comply with these provisions can result in significant legal consequences. Under the Civil Aviation Act 1988, non-compliance with an Airworthiness Directive can lead to civil penalties. Specifically, for each day that non-compliance continues, a fine of up to $5,500 may be imposed (s. 96A(1)). Additionally, operators may face criminal charges if the non-compliance results in the operation of an aircraft that is not airworthy, which can lead to fines of up to $1,100,000 for a corporation and imprisonment for up to 5 years for an individual (s. 96A(3)). The severity of the penalties underscores the importance of adhering to these airworthiness directives to ensure the safety and compliance of all Boeing 747 aircraft in operation.