Overview

The Civil Aviation Regulations 1998, enacted by the Australian Parliament, serve as a comprehensive framework governing civil aviation within the country. One particular legislative instrument, F2006B03054, was introduced to address critical safety concerns specific to Boeing 747 Series aeroplanes. This legislative instrument targets the maintenance and inspection of the wings, specifically the front spar web between certain stations, to prevent structural failures that could lead to catastrophic outcomes such as fuel leaks or fires. The policy objective is to ensure the airworthiness of these aircraft by mandating rigorous inspection procedures to be performed at specified intervals, thereby safeguarding the safety of passengers and crew. Compliance with these directives is imperative, with initial inspections required before further flight after the enactment date and subsequent inspections to be conducted at intervals not exceeding 1000 flights.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to the Boeing 747 Series Aeroplanes, with the focus on aircraft identified as B747SP, and variable numbers RG001 to RG142 and RG171 to RG222 inclusive. This regulation is issued by the Civil Aviation Safety Authority (CASA) and concerns the safety directive for inspecting the front spar web of the wings between front spar stations 628 and 675. The requirement mandates an ultrasonic, detailed visual and high-frequency eddy current inspection according to Boeing Service Bulletin 747-57A2259, Revision 2. This directive applies nationally within Australia and is in line with a Federal Aviation Administration (FAA) directive. Compliance involves conducting the initial inspection before further flights after 20 July 1995, with subsequent inspections occurring at intervals not exceeding 1000 flights. The directive was implemented following the discovery of a 790 mm crack in the front spar web of a 747SP aircraft, which led to fuel leakage and potential fire hazards. The modification in accordance with Boeing Service Bulletin 747-57A2259, Revision 2, effectively cancels the inspection requirement of this specific directive.

Key Provisions

The Civil Aviation Regulations 1998, specifically under Part 39 - 105, include a schedule of airworthiness directives that mandate certain inspections and modifications for Boeing 747 Series Aeroplanes. One such directive, AD/B747/152, pertains to the wings of B747SP aircraft, covering variable numbers RG001 to RG142 and RG171 to RG222, inclusive. This directive was issued on 8 July 1995 and requires operators to perform an ultrasonic, detailed visual, and high-frequency eddy current inspection of the wing front spar web between front spar stations 628 and 675. This inspection must comply with the Boeing Service Bulletin (SB) 747-57A2259, Revision 2. The directive mandates that an initial inspection must be conducted before further flight after 20 July 1995. Subsequent inspections are required at intervals not exceeding 1000 flights. This regular inspection requirement aims to detect any potential cracks in the front spar web, which, if left undetected, could lead to structural degradation and potentially catastrophic outcomes such as fuel leaks and fires, as evidenced by an incident where a 790 mm crack was found during a refuelling operation. Compliance with this directive is critical to maintaining the airworthiness of the affected aircraft. Operators of the specified Boeing 747SP aircraft are required to adhere to these inspection protocols strictly. Failure to comply with the mandated inspections could result in non-compliance with civil aviation safety standards, potentially leading to severe consequences for the aircraft's airworthiness certification. This oversight is crucial as it directly impacts the safety and operational integrity of the aircraft. In the event of non-compliance with the airworthiness directive AD/B747/152, there could be significant legal and operational repercussions. Although the specific penalties are not detailed within the text of the directive, non-compliance with Civil Aviation Regulations can generally result in enforcement actions, fines, and other administrative penalties. The severity of these consequences can vary based on the extent of the non-compliance and its impact on aviation safety. Ensuring adherence to these directives is therefore essential for operators to avoid potential legal and safety issues.