AD/B747/83 - Fuel Tank Access Doors

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of the Commonwealth of Australia, provide a comprehensive framework for the regulation of civil aviation in Australia. One specific area of focus within these regulations is the maintenance and airworthiness of aircraft, as evidenced by Part 39 - 105, which pertains to the Civil Aviation Safety Authority's (CASA) Schedule of Airworthiness Directives. The problem this legislation addresses is the need to ensure that aircraft meet stringent safety standards, particularly in relation to the integrity of fuel tank access doors. The policy objective is to mandate specific actions, such as those outlined in Boeing Alert SB 747-28A2117 Revision 2, to enhance the resistance of fuel tank access panels to impacts, thereby reducing the risk of penetration from engine debris or objects thrown by the aircraft tyres. This measure aligns with Federal Aviation Regulation (FAR) 25.963(e) and is aimed at improving overall aviation safety. The specific directive in question, AD/B747/83, applies to Boeing 747 series aeroplanes with certain line numbers, excluding the 747-400 model, and mandates compliance with the First Phase and Second Phase actions by specified deadlines. These actions require adherence to the Boeing Service Bulletin and reference FAA AD 89-12-10 Amendment 39-6230, underscoring the importance of maintaining high safety standards across international aviation operations. The directive reflects a coordinated effort to mitigate risks associated with fuel tank integrity, ensuring that aircraft continue to operate safely within Australian airspace and beyond.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, under the Civil Aviation Safety Authority Schedule of Airworthiness Directives, addresses the Boeing 747 Series aeroplanes in relation to fuel tank access doors. This legislation applies to all Boeing 747 aircraft with line numbers ranging from 001 to 678, 680 to 684, and 686 to 720, with the exception of the 747-400 model. The directive mandates compliance with Boeing Alert Service Bulletin 747-28A2117 Revision 2, covering both the First Phase and Second Phase actions. The First Phase requires compliance prior to 31 December 1990, while the Second Phase must be completed before 31 October 1992. This regulation is a country of origin AD, designed to ensure compliance with Federal Aviation Regulation 25.963(e), which stipulates that fuel tank access panels must have a higher resistance to impact to reduce the risk of penetration from engine debris or objects thrown by the aircraft tyres. The scope of this legislation is national, affecting all relevant aircraft within the Commonwealth of Australia, and its implementation may be extended or restricted through subordinate instruments as necessary.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39-105, provides detailed directives on the airworthiness of Boeing 747 series aeroplanes. Section AD/B747/83 pertains to fuel tank access doors, which is critical for ensuring the safety of these aircraft (section 1). This directive applies to all Boeing 747 aircraft with line numbers ranging from 001-678, 680-684, and 686-720, with the exception of the 747-400 model (section 2). The requirement is to implement actions as outlined in Boeing Alert Service Bulletin (SB) 747-28A2117 Revision 2, covering both the First Phase and the Second Phase (section 3). This directive aligns with the Federal Aviation Administration (FAA) AD 89-12-10 Amendment 39-6230 and FAR 25.963(e), which mandates that fuel tank access panels must have increased resistance to impact to mitigate the risk of penetration from engine debris or objects thrown by the aircraft tyres (section 4). Compliance with the AD/B747/83 directive is crucial and is broken down into two phases. The First Phase mandates that all specified aircraft must comply by 31 December 1990 (section 5). The Second Phase requires compliance by 31 October 1992 (section 6). These dates are non-negotiable and must be adhered to strictly to ensure the safety and airworthiness of the aircraft. The background of this directive originates from the country of the Federal Aviation Regulations (FAR), which highlights the importance of maintaining stringent standards for fuel tank access panels to enhance overall aircraft safety (section 7). Entities governed by these regulations, primarily aircraft operators and maintenance service providers, are obligated to ensure that all modifications and inspections are carried out in accordance with the specified Boeing Service Bulletin and Federal Aviation Regulations. This includes performing the necessary inspections, repairs, and modifications to the fuel tank access doors as per the given deadlines to maintain the aircraft's airworthiness certification (section 8). Operators and service providers must also maintain comprehensive records of compliance, including documentation of inspections, modifications, and any other relevant actions taken (section 9). Failure to comply with these directives can result in serious consequences, including the potential grounding of the aircraft and legal repercussions. Any breach of these regulations can lead to significant civil and criminal consequences. The Civil Aviation Safety Authority (CASA) may impose penalties, which can include fines or other administrative sanctions (section 10). Additionally, operators found in breach of these airworthiness directives may face criminal charges, which could result in substantial fines or imprisonment (section 11). The maximum penalties for such breaches can be severe, reflecting the critical importance of adhering to these safety directives to protect the public and maintain the integrity of the aviation industry (section 12).